AU714489B2 - Stabiliser combinations for chlorine-containing polymers - Google Patents

Abstract

A stabilizer combination comprises at least one uracil compound and at least one alkali- or alkaline earth hydroxide, (hydrogen)carbonate or carboxylate. A stabilizer combination (I) comprises (A) at least one uracil compound of formula (1) and (B) at least one alkali- or alkaline earth hydroxide, (hydrogen)carbonate or carboxylate. R1asterisk, R2asterisk = 1-12C alkyl, 3-6C alkenyl optionally substituted by one to three 1-4C alkyl, alkoxy, 5-8C cycloalkyl or OH or Cl substituted 5-8C cycloalkyl, phenyl optionally substituted with one to three 1-4C alkyl, alkoxy or 5-8C cycloalkyl or OH or Cl substituted 7-9C phenyl alkyl or H; and Y = O or S. Independent claims are included for: (i) a composition comprising a chlorine containing polymer and the combination (I); and (ii) a process for the stabilization of a chlorine containing polymer by addition of the combination (I).

Description

Our Ref: 613137 P/00/011 Regulation 3:2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE SPECIFICATION STANDARD PATENT YJtc o +5ny\ Acdc;Xie B-68Q3 Lup~tl; 's 0m n Applicant(s): Kl"be-ktrass 141- 4qT4ERLAJD DAVIES COLLISON CAVE Patent Trade Mark Attorneys Level 10, 10 Barrack Street SYDNEY NSW 2000 or% \SaA.A 0 R3A( 1 113 Lu SEN T 0 ab r Address for Service: Invention Title: Stabiliser combinations for chlorine-containing polymers The following statement is a full description of this invention, including the best method of performing it known to me:- 5020 A-20602/A/CGM 472 1 Stabiliser combinations for chlorine-containing polymers The invention relates to stabiliser combinations consisting of a compound of formula I shown below and at least one further substance from the following groups: the perchlorate compounds, glycidyl compounds, beta-diketones, betaketo esters, dihydropyridines, polydihydropyridines, polyols, disaccharide alcohols, sterically hindered amines (tetraalkylpiperidine compounds), alkali aluminosilicates, hydrotalcites and alkali aluminocarbonates (dawsonites), alkali- (or alkaline earth-) carboxylates,-(bi)carbonates oder -hydroxides, antioxidants, lubricants or organotin compounds which are suitable for stabilising chlorinecontaining polymers, especially PVC.PVC can be stabilised by a number of additives. Compounds of lead, barium and cadmium are especially suitable for the purpose but are controversial today for ecological reasons or owing to their heavy metal content (cf. "Kunstoffadditive" (Plastics additives), R. Gachter/- H. Miller, Carl Hanser Verlag, 3 r Edition, 1989, pages 303-311, and "Kunststoff Handbuch PVC" (Plastics Handbook PVC), Volume 2/1, W.Becker/D.Braun, Carl Hanser Verlag, 2 n d Edition, 1985, pages 531-538; and Kirk-Othmer: "Encyclopedia of Chemical Technology", 4 t h Ed., 1994, Vol 12, Heat Stabilizers p.

1071-1091). Other effective stabilisers and stabiliser combinations that are free of lead, barium and cadmium are therefore sought.Compounds of formula I have already been described in DE-PS 1 694 873, EP 65 934 and EP 41 479 and can be prepared in one or several process step(s) by known methods.It has now been found that A) compounds of formula I R* N

N

Y N NH 2 R (I) wherein R*1 and R*2 are each independently of the other C1-C12alkyl, C3- C6alkenyl, C5-C8cycloalkyl that is unsubstituted or substituted by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or hydroxy groups or chlorine atoms, or C7-C9phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or hydroxy groups or chlorine atoms, and R*1 and R*2 may additionally be hydrogen and C1-C12alkyl, and Y is S or O, can be combined with B) at least one compound from the following group: perchlorate compounds and/or glycidyl compounds and/or beta-diketones, beta-keto esters and/or dihydropyridines, polydihydropyridines and/or polyols, disaccharide alcohols and/or sterically hindered amines (tetraalkylpiperidine compounds) and/or alkali aluminosilicates (zeolites) and/or hydrotalcites and/or alkali aluminocarbonates (dawsonites) and/or, alkali- (or alkaline earth-) carboxylates,-(bi)carbonates oder -hydroxides, and/or antioxidants and lubricants and/or organotin compounds for the purpose of stabilising chlorine-containing polymers, especially PVC.

For compounds of formula I: CI-C4Alkyl is, for example: methyl, ethyl, n-propyl, isopropyl, iso-, sec- or tert-butyl.

C1-C12Alkyl is, for example, in addition to the radicals just mentioned, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, isooctyl, decyl, nonyl, undecyl or dodecyl.

C1-C4Alkoxy is, for example, methoxy, ethoxy, propoxy, isopropoxy, butoxy or isobutoxy.

C5-C8Cycloalkyl is, for example, cyclopentyl, cyclohexyl, cycloheptyl or cyclooctyl.

C7-C9Phenylalkyl is, for example, benzyl, 1- or 2-phenylethyl, 3-phenylpropyl, .a,a-dimethylbenzyl or 2-phenylisopropyl, preferably benzyl.

When the cycloalkyl groups or the phenyl group of the phenylalkyl radicals are substituted, then they are substituted preferably by two or one substituent and, of the substituents, especially by CI, hydroxy, methyl or methoxy.

C3-C6Alkenyl is, for example, vinyl, allyl, methallyl, 1-butenyl or 1-hexenyl, preferably allyl.

Preference is given to compounds of formula I wherein R*1 and R*2 are each independently of the other C1-C4alkyl and hydrogen.

Especially preferably, either R*1 and R*2 are identical and are methyl, ethyl, propyl, butyl or allyl, or they are different and are ethyl and allyl.

To achieve stabilisation in a chlorine-containing polymer, the compounds of component A) are to be used in an amount of advantageously from 0.01 to 10 by weight, preferably from 0.05 to 5 by weight, and especially from 0.1 to 3 by weight.

The compounds of the groups mentioned under B) are illustrated as follows: Perchlorate compounds Examples are those of formula M(C104)n, wherein M is Li, Na, K, Mg, Ca, Sr, Zn, Al, La or Ce. According to the value of M, the index n is 1, 2 or 3. The perchlorate salts may be complexed with alcohols (polyols, cyclodextrins) or ether alcohols or ester alcohols. The ester alcohols include also the polyol partial esters. Also suitable in the case of polyhydric alcohols or polyols are their dimers, trimers, oligomers and polymers, such as di-, tri-, tetra- and polyglycols, and di-, tri- and tetra-pentaerythritol or polyvinyl alcohol in various degrees of polymerisation. The perchlorate salts can be introduced in various known forms, for example in the form of a salt or an aqueous solution applied to a substrate, such as PVC, calcium silicate, zeolites or hydrotalcites, or bound in a hydrotalcite by chemical reaction. Glycerol monoethers and glycerol monothioethers are preferred as polyol partial ethers. Other forms are described in EP 394 547, EP 457 471 and WO 94/24 200.

The perchlorates can be used in an amount of, for example, from 0.001 to advantageously from 0.01 to 3, especially from 0.01 to 2, parts by weight, based on 100 parts by weight PVC.

6 ycidyl compounds

*O

These contain the glycidyl group CH2 n which is bonded Rd R 2

R

3 directly to carbon, oxygen, nitrogen or sulfur atoms and wherein either R1 and R3 are both hydrogen, R2 is hydrogen or methyl and n=O, or R1 and R3 together are -CH2-CH2- or -CH2-CH2-CH2-, in which case R2 is hydrogen and n=O or 1.

I) Glycidyl and b-methylglycidyl esters obtainable by reacting a compound having at least one carboxy group in the molecule with epichlorohydrin or glycerol dichlorohydrin or b-methyl-epichlorohydrin. The reaction is advantageously carried out in the presence of bases.

Aliphatic carboxylic acids may be used as compounds having at least one carboxy group in the molecule. Examples of those carboxylic acids are glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid or dimerised or trimerised linoleic acid, acrylic acid and methacrylic acid, caproic acid, caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid and pelargonic acid, and the acids mentioned in connection with the organic zinc compounds.

It is, however, also possible to use cycloaliphatic carboxylic acids, such as cyclohexanecarboxylic acid, tetrahydrophthalic acid, 4methyltetrahydrophthalic acid, hexahydrophthalic acid or 4methylhexahydrophthalic acid.

It is also possible to use aromatic carboxylic acids, such as benzoic acid, phthalic acid, isophthalic acid, trimellitic acid or pyromellitic acid.

Carboxy-terminated adducts, for example of trimellitic acid and polyols, such as glycerol or 2,2-bis(4-hydroxycyclohexyl)propane can also be used.

Other epoxide compounds that can be used within the scope of this invention are to be found in EP 0 506 617.

II) Glycidyl or (b-methylglycidyl) ethers obtainable by reacting a *compound having at least one free alcoholic hydroxy group and/or phenolic hydroxy group and a suitably substituted epichlorohydrin under alkaline conditions, or in the presence of an acid catalyst with subsequent treatment with an alkali.

Ethers of that type are derived, for example, from acyclic alcohols, such as ethylene glycol, diethylene glycol and higher poly(oxyethylene) glycols, "propane-1,2-diol, or poly(oxypropylene) glycols, propane-1,3-diol, butane-1,4diol, poly(oxytetramethylene) glycols, pentane-1,5-diol, hexane-1,6-diol, hexane-2,4,6-triol, glycerol, 1,1,1-trimethylolpropane, bistrimethylolpropane, pentaerythritol, sorbitol, and from polyepichlorohydrins, butanol, amyl alcohol, pentanol, and from monofunctional alcohols, such as isooctanol, 2ethylhexanol, isodecanol and C7-C9alkanol and C9-C1ialkanol mixtures.

They are, however, also derived, for example, from cycloaliphatic alcohols, such as 1,3- or 1,4-dihydroxycyclohexane, bis(4-hydroxycyclohexyl)methane, 2,2-bis(4-hydroxycyclohexyl)propane or 1,l-bis(hydroxymethyl)cyclohex-3ene, or they have aromatic nuclei, such as N,N-bis(2-hydroxyethyl)aniline or p,p'-bis(2-hydroxyethylami no)di phenylmethane.

The epoxide compounds can also be derived from mononuclear phenols, such as phenol, resorcinol or hydroquinone, or they are based on polynuclear phenols, such as bis(4-hydroxyphenyl)methane, 2,2-bis(4hydroxyphenyl)propane, 2,2-bis(3,5-di bromo-4-hydroxyphenyl)propane, 4,4'dihydroxydiphenylsulfone, or on condensation products of phenols with formaldehyde obtained under acid conditions, such as phenol novolaks.

Other possible terminal epoxides are, for example: glycidyl-1-naphthyl ether, glycidyl-2-phenylphenyl ether, 2-biphenylglycidyl ether, N-(2,3epoxypropyl) phthalimide and 2,3-epoxypropyl-4-methoxyphenyl ether.

III) (N-Glycidyl) compounds obtainable by dehydrochlorinating the reaction products of epichlorohydrin with amines containing at least one aminohydrogen atom. Those amines are, for example, aniline, N-methylaniline, toluidine, n-butylamine, bis(4-aminophenyl)methane, m-xylylenediamine or bis(4-methylaminophenyl)methane, but also N,N,O-triglycidyl-m-aminophenol or N,N,O-triglycidyl-p-aminophenol.

The (N-glycidyl) compounds also include, however, N,N',N"-triand N,N',N",N"'-tetra-glycidyl derivatives of cycloalkyleneureas, such as ethyleneurea or 1,3-propyleneurea, and N,N'-diglycidyl derivatives of hydantoins, such as 5,5-dimethylhydantoin or glycoluril and triglycidyl isocyanurate.

IV) S-Glycidyl compounds, such as di-S-glycidyl derivatives, that are derived from dithiols, such as ethane-1,2-dithiol or bis(4mercaptomethylphenyl) ether.

V) Epoxide compounds containing a radical of formula I wherein R1 and R3 together are -CH2-CH2- and n is 0 are bis(2,3-epoxycyclopentyl) ether, 2,3-epoxycyclopentylglycidyl ether or 1,2-bis(2,3epoxycyclopentyloxy)ethane. An epoxy resin containing a radical of formula I wherein R1 and R3 together are -CH2-CH2- and n is I is, for example, 3,4epoxy- 6 -methylcyclohexanecarboxyl ic acid (3',4'-epoxy-6'met hylcyclohexyl)-methyl ester.

Suitable terminal epoxides are, for example TM dnts) a) liquid diglycidyl ethers of bisphenol A, such as AralditeTM GY 240, AralditeTA66Y 250, AralditeTm&y 260, AralditeTm&Y 266, AralditeTmC7Y 2600, AralditeTMY 790; b) solid dliglycidyl ethers of bisphenol A, such as AralditeTMG7T 6071, AralditeTmGT 7071, AralditeTmGT 7072, A ralditeTAAGT 6063, AralditeTmGT 7203, AralditeTMAGT 6064, AralditeTmGT 7304, AralditeTmGT 7004, AralditeTmGT 6084, AralditeTmGT 1999, AraldliteTmGT 7077, AralditeTmGT 6097, AralditeTmGT 7097, AraldliteTmGT 7008, AralditeTmGT 6099, AralditeTmGT 6608, AralditeTmGT 6609, AralditeTmGT 6610; c) liquid diglycidyl ethers of bisphenol F, such as AralditeTMGY 281, AralditeTmPY 302, AralditeTmPy 306; d) solid polyglycidyl ethers of tetraphenylethane, such as CG Epoxy Resi nTmO 63 e) solid and liquid polyglycidyl ethers of phenolformaldlehyde novolak, such as EPN 1138, EPN 1139, GY 1180, PY 307; f) solid and liquid polyglycidyl ethers of o-cresolformaldehyde novolak, such as ECN 1235, ECN 1273, ECN 1280, ECN 1299; g) liquid glycidyl ethers of alcohols, such as 5hellTm glycidyl ether 162, AralditeTmt)Y 0390, AraldliteT 0391; h) liquid glycidyl ethers of carboxylic acids, such as ShellTMCardura

E

terephthalic acid ester, trimellitic acid ester, AralditeTmPY 284; solid heterocyclic epoxy resins (triglycidyl isocyanurate), such as AralditeTm PT 810; liquid cycloaliphatic epoxy resins, such as AralditeTMCY 179; k) liquid N,N,O-triglycidyl ethers of p-aminophenol, such as AraldliteTMMY 0510; 1) tetrag lyc idyl-4,4'-methylenebenzam i ne or N,N,N',N'-tetraglycidyl diaminophenylmethane, such as AralditeTMMy 720, AralditeTMMY 721.

Preference is given to the use of epoxide compounds having two functional groups. It is, however, also possible in principle to use epoxide compounds having one, three or more functional groups.

~1-lli.i There are used predominantly epoxide compounds, especially diglycidyl compounds, having aromatic groups.

Where appropriate, a mixture of different epoxide compounds can also be used.

Especially preferred as terminal epoxide compounds are diglycidyl ethers based on bisphenols, such as 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), bis(4-hydroxyphenyl)-methane or mixtures of bis(ortho/parahydroxyphenyl)methane (bisphenol F).

The terminal epoxide compounds can be used in an amount of, preferably, at least 0.1 part, for example from 0.1 to 50, advantageously from 1 to 30, and especially from 1 to 25, parts by weight, based on 100 parts by weight PVC.

Beta-diketones, beta-keto esters 1,3-Dicarbonyl compounds that can be used may be linear or cyclic dicarbonyl compounds. Preference is given to the use of dicarbonyl compounds of the following formula: R'1CO CHR2'-COR'3 wherein R'1 is C1-C22alkyl, C5-C10hydroxyalkyl, C2-Cl8alkenyl, phenyl, phenyl substituted by OH, C1-C4alkyl, C1-C4alkoxy or by halogen, C7-Clophenylalkyl, C5-C12cycloalkyl, C5-C12cycloalkyl substituted by C1-C4alkyl, or is a group S-R6 or -R'5-O-R'6, R'2 is hydrogen, C1-C8alkyl, C2-C12alkenyl, phenyl, C7-C12alkylphenyl, C7- Cl0phenylalkyl or a group -CO-R'4, R'3 has one of the meanings given for R'1 or is C1-C18alkoxy, R'4 is C1-C4alkyl or phenyl, R'5 is C1-Cloalkylene and R'6 is C1i-C12alkyl, phenyl, C7-C18alkylphenyl or Those compounds include the hydroxy group-containing diketones of EP 346 279 and the oxa- and thia-diketones of EP 307 358, as well as the keto esters based on isocyanic acid of US 4 339 383.

R'i and R'3 as alkyl may be, especially, C1-Cl8alkyl, such as methyl, ethyl, npropyl, isopropyl, n-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, decyl, dodecyl or octadecyl.

R'i and R'3 as hydroxyalkyl are, especially, a group -(CH2)n-OH, wherein n is 6 or 7.

R'I and R'3 as alkenyl may be, for example, vinyl, allyl, methallyl, 1-butenyl, 1hexenyl or oleyl, preferably allyl.

R'i and R'3 as phenyl substituted by OH, alkyl, alkoxy or halogen may be, for example, tolyl, xylyl, tert-butylphenyl, methoxyphenyl, ethoxyphenyl, hydroxyphenyl, chlorophenyl or dichlorophenyl.

R'j and R'3 as phenylalkyl are especially benzyl. R'2 and R'3 as cycloalkyl or alkylcycloalkyl are especially cyclohexyl or methylcyclohexyl.

R'2 as alkyl may be, especially, C1-C4alkyl. R'2 as C2-Cl2alkenyl may be, especially, allyl. R'2 as alkylphenyl may be, especially, tolyl. R'2 as phenylalkyl may be, especially, benzyl. R'2 is preferably hydrogen. R'3 as alkoxy may be, for example, methoxy, ethoxy, butoxy, hexyloxy, octyloxy, dodecyloxy, fridecyloxy, tetradecyloxy or octadecyloxy. R'5 as Ci-Cloalkylene is especially C2- C4alkylene. R'6 as alkyl is especially C4-Ci2alkyl, such as butyl, hexyl, octyl, decyl or dodecyl. R'6 as alkylphenyl is especially tolyl. R'6 as phenylalkyl is especially benzyl.

Examples of 1,3-dicarbonyl compounds of the above formula and their alkali metal, alkaline earth metal and zinc chelates are acetylacetone, butanoylacetone, heptanoylacetone, stearoylacetone, palm itoylaceto ne, lauroylacetone, 7-tert-nonylthio-heptane-2 ,4-dione, benzoylacetone, dibenzoylmethane, lauroylbenzoylmethane, palmitoyl-benzoylmethane, stearoylbenzoylmethane, isooctylbenzoylmethane, tri benzoylmethane, bis(4-methylbenzoyl)methane, benzoyl-pchlorobenzoylmethane, bis(2-hydroxybenzoyl)methane, 4-methoxybenzoylbenzoylmethane, bis(4-methoxybenzoyl)methane, i-benzoyl-l-acetylnonane, benzoyl-acetylphenylmethane, stearoyl-4-methoxybenzoylmethane, bis(4-tertbutylbenzoyl)methane, benzoyl-formylmethane, benzoyl-phenylaceiylmethane, biscyclohexanoyl-methane, di-pivaloyl-methane, 2-acetylcyclopentanone, 2-benzoylcyclopentanone, diacetoacetic acid methyl, ethyl and allyl ester, benzoyl-, propionyl- and butyryl-acetoacetic acid methyl and ethyl ester, 9 triacetylmethane, acetoacetic acid methyl, ethyl, hexyl, octyl, dodecyl or octadecyl ester, benzoylacetic acid methyl, ethyl, butyl, 2-ethylhexyl, dodecyl or octadecyl ester, and propionyl- and butyryl-acetic acid C1-C18alkyl ester.

Stearoylacetic acid ethyl, propyl, butyl, hexyl or octyl ester and polynuclear

P-

keto esters as described in EP 433 230 and dehydroacetic acid and the zinc, magnesium or alkali metal salts thereof.

Preference is given to 1,3-diketo compounds of the above formula wherein R'1 is C1-C18alkyl, phenyl, phenyl substituted by OH, methyl or by methoxy, C7- ClOphenylalkyl or cyclohexyl, R'2 is hydrogen and R'3 has one of the meanings given for R'1.

The 1,3-diketo compounds can be used in an amount of, for example, from 0.01 to 10, advantageously from 0.01 to 3, and especially from 0.01 to 2, parts by weight, based on 100 parts by weight PVC.

Dihydropyridines, polydihydropyridines Suitable monomeric, dihydropyridines are described, for example, in FR 20 39 496, EP 2007, EP 0 362 012, EP 0 286 887 and EP 0 024 754.

z z Preference is given to those of the formula I I wherein Z is

H

3 C NH CH 3

COCH

3

CO

2

C

2 H5 CO2C 12

H

25 or CO 2

C

2

H

4 SnC 1 2

H

2 5 Suitable polydihydropyridines are especially compounds of the following formula o R" o o R" o R" o T R 0 0 3 N 0 HC

CH

3 H3C N CH 3 H3C N CH S. H -mL H n

H

•go• wherein T is CI-C22alkyl that is unsubstituted or substituted by Cj- Cl 8a1 koxy, Cl-Cl 8alkylthio, hydroxy, acryloyloxy, methacryloyloxy, halogen, phenyl or by naphthyl; that is unsubstituted or substituted by Cl-Cl8alkyl, C1-Cl8alkoxy or by halogen and that may also be heterocyclic; C3-Cloalkenyl, CH3-C0-CH2-CO-OR-, CH3-CO-CH2-COO-.', CH3- C(NR"' 2)=CH-COOR- or CH3-C(NR"'2)=CHCO-O L has the same meanings as T or is a tri- or poly-valent radical from an unsubstituted or Cl-Cl2alkoxy-, Cl-Cl2thioalkoxy-, C6-Cloaryl-, Ci- Cl2carboxy- or hydroxy-substituted straight-chained or branched alkyl group, m and n are numbers from 0 to k is 0 or 1, j is a number from 1 to 6 and the conditions j m n) I and m n 0 are satisf ied, R~ and R' are each independently of the other methylene or phenylene or an alkylene group of the type -(-CpH2p-X-)t CpH2p- that is unsubstituted or carries substituents from the series C1-Cl2alkoxy, C1-Cl2thioalkoxy, C6- Cloaryl, Cl-Cl2carboxy and hydroxy, p is from 2 to 18, t is from 0 to Xis oxygen or sulfur, a. or, when k is 0 and j 1, R and R' together with L form a direct bond, is hydrogen, or C1-Cl8alkyl, C2-Cl8alkoxycarbonyl or C6-Cloaryl each of which is unsubstituted or substituted by one or more C1-Cl2alkyl, C1-C8alkoxy, a:::':halogen or N02 substituents, and the two radicals are identical or different and are hydrogen, Cj- Cl8alkyI, CI-C18-hydroxyalkyl or C1-Cl8alkoxyalkyl or together are uninterrupted or 0-interrupted or are straight-chained or branched C2-C22aIkenyl.

a Such compounds are described in more detail in EP 0 286 887.

Thiodiethylene-bis[5-methoxycarbonyl-2,6-dimethyl-1,4-dihydropyridine-3carboxylate] is especially preferred.

Die (Poly-)Dihydropyridine konnen im chlorhaltigen Polymer zweckmaig zu 0,001 bis 5 und insbesondere 0,005 bis 1 Gew.-Teilen, bezogen auf das Polymer, angewandt werden.

Polyols, disaccharide alcohols Examples of suitable compounds of that type are: pentaerythritol, dipentaerythritol, tripentaerythritol, bistrimethylol Ipropane, bistrimethylolethane, trismethyloIpropane, inosite, polyvinylalcohol, sorbitol, maltite, isomaltite, lactite, lycasin, mannitol, lactose, leucrose, tris(hydroxyethyl) isocyanurate, palatinite, tetramethylo Icyclohexano

I,

tetramethyloIcyclopentanol, tetramethylolcyclopyranol, glycerol, diglycerol, polyglycerol, thiodiglycerol or 1-0-a--glycopyranosyl--mannito di hydrate. Of those compounds, preference is given to the disaccharide alcohols.

The polyols can be used in an amount of, for example, from 0.01 to advantageously from 0.1 to 20, and especially from 0.1 to 10, parts by weight, based on 100 parts by weight PVC.

Sterically hindered amines (tetraalkylpiperidine compounds) The sterically hindered amines, especially piperidine compounds, that can be used according to the invention are known especially as light stabilisers. Those compounds contain one or more groups of the formula HC N

CH

3

H

3

C

.**.CH3 They may be compounds of relatively low molecular weight (<700) or of relatively high molecular weight. In the latter case they may be oligomeric or polymeric products. Preference is given to tetramethylpiperidine compounds having a molecular weight of more than 700 that contain no ester groups.

Especially important as stabilisers are the following classes of tetramethylpiperidine compounds.

12 In the following classes a) to substituents having subscript indices in their formula drawings correspond (for technical reasons) to the substituents having superscript indices in the description or definition belonging to the formula drawing in question. Thus, for example, the substituent "RI" in formula (II) corresponds to in the descriptions.

a) Compounds of formula II

H

3 C

CH

3 RT-N N) O- 0--R2

SH

3 C CH 3 n

(II),

wherein n is a number from 1 to 4, preferably 1 or 2,

R

1 is hydrogen, oxy, C1-C12alkyl, C3-C8alkenyl, C3-C8alkynyl, C7-Cl2aralkyl, C1-C8alkanoyl, C3-C5alkenoyl, glycidyl or a group -CH2CH(OH)-Z, wherein Z is hydrogen, methyl or phenyl, R 1 being preferably C1-C4alkyl, allyl, benzyl, acetyl or acryloyl, and, .2 0* when n is1, R 2 is hydrogen, C1-C18alkyl that is uninterrupted or interrupted by one or more oxygen atoms, cyanoethyl, benzyl, glycidyl, a monovalent radical of an aliphatic, cycloaliphatic, araliphatic, unsaturated or aromatic carboxylic acid, carbamic acid or phosphorus-containing acid or a monovalent silyl radical, preferably a radical of an aliphatic carboxylic acid having from 2 to 18 carbon atoms, a cycloaliphatic carboxylic acid having from 7 to 15 carbon atoms, an a,punsaturated carboxylic acid having from 3 to 5 carbon atoms or an aromatic carboxylic acid having from 7 to 15 carbon atoms, and, when n is 2, R 2 is C1-C12alkylene, C4-C12alkenylene, xylylene, a divalent radical of an aliphatic, cycloaliphatic, araliphatic or aromatic dicarboxylic acid, dicarbamic acid or phosphorus-containing acid or a divalent silyl radical, preferably a radical of an aliphatic dicarboxylic acid having from 2 to 36 carbon atoms, a cycloaliphatic or aromatic dicarboxylic acid having from 8 to 14 carbon atoms or an aliphatic, cycloaliphatic or aromatic dicarbamic acid having from 8 to 14 carbon atoms, and, when n is 3, R2 is a trivalent radical of an aliphatic, cycloaliphatic or aromatic tricarboxylic acid, an aromatic tricarbamic acid or a phosphoruscontaining acid or a trivalent silyl radical and, when n is 4, R 2 is a tetravalent radical of an aliphatic, cycloaliphatic or aromatic tetracarboxylic acid.

When any of the substituents are C1-C12alkyl, they are, for example, methyl, ethyl, n-propyl, n-butyl, sec-butyl, tert-butyl, n-hexyl, n-octyl, 2-ethyl-hexyl, nnonyl, n-decyl, n-undecyl or n-dodecyl.

In the meaning of C1-Cl8alkyl, R 2 may be, for example, the groups listed above and, in addition, for example, n-tridecyl, n-tetradecyl, n-hexadecyl or noctadecyl.

When R1 is C3-C8alkenyl, it may be, for example, 1-propenyl, allyl, methallyl, 2-butenyl, 2-pentenyl, 2-hexenyl, 2-octenyl or 4-tert-butyl-2-butenyl.

R

1 as C3-C8alkynyl is preferably propargyl.

As C7-C12aralkyl,

R

1 is especially phenethyl and more especially benzyl.

R

1 as C1-C8alkanoyl is, for example, formyl, propionyl, butyryl, octanoyl, but preferably acetyl, and as C3-C5alkenoyl is especially acryloyl.

When R is a monovalent radical of a carboxylic acid, it is, for example, an acetic acid, caproic acid, stearic acid, acrylic acid, methacrylic acid, benzoic acid or 3 5 -di-tert-butyl-4-hydroxyphenyl)-propionic acid radical.

When R2 is a divalent radical of a dicarboxylic acid, it is, for example, a malonic acid, succinic acid, glutaric acid, adipic acid, suberic acid, sebacic acid, maleic acid, phthalic acid, dibutylmalonic acid, dibenzylmalonic acid, di-tert-butyl-4-hydroxybenzyl)-malonic acid or bicycloheptenedicarboxylic acid radical.

When R2 is a trivalent radical of a tricarboxylic acid, it is, for example, a o* trimellitic acid or nitrilotriacetic acid radical.

When R 2 is a tetravalent radical of a tetracarboxylic acid, it is, for example, t* he tetravalent radical of butane-1,2,3,4-tetracarboxylic acid or of pyromellitic acid.

When R 2 is a divalent radical of a dicarbamic acid, it is, for example, a hexamethylenedicarbamic acid or a 2,4-toluylene-dicarbamic acid radical.

The following compounds are examples of polyalkylpiperidine compounds of that class: 1) 4-hydroxy-2 ,2 ,6,6-tetramethylpi peridi ne 2) l-allyl- 4 -hydroxy-2,2,6,6-tetramethylpiperidine 3) 1-benzyl-4-hydroxy-2 ,2,6 ,6-tetramethylpi peridinte 4) 1-(4-tert-butyl-2-butenyl)-4-hydroxy-2 ,2 ,6,6-tetramethylpi peridinte 4-stearoyloxy-2 ,2 ,6,6-tetramethylpiperidinte 6) 1 -ethyl -4-sal i cyloyloxy- 2,2 ,6,6-tetramethyl pi peridi tie 7) 4-met hacryIoyloxy-1, ,2,2 ,6 ,6-pentamethyl piper id i ne 8) 1,2,2 ,6,6-pentamethylpi peridi n-4-yl-13-(3 ,5-di-tert-butyl-4-hydroxyphenyl) propionate 9) di(l-benzyl-2,2,6,6-tetramethylpiperidin-4-.yl) maleinate di(2,2,6,6-tetramethylpiperidin-4-y) succinate 11) di(2,2,6,6-tetramethylpiperidin-4-yl) glutarate 12) di(2,2,6,6-tetramethylpiperidin-4-yl) adipate 13) di(2,2,6,6-tetramethylpiperidin-4-yl) sebacate 14) di(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate di(1 ,2,3 ,6-tetramethyl-2 ,6-diethylpi peridi n-4-yl) sebacate 16) di(l-allyl-2,2 ,6,6-tetramethylpiperidin-4-yl) phthalate 17) 1 -pro pargyl -413- cyanoet hyloxy- 2,2 ,6,6 -tetramethyIpi perid i tie 18) 1 -acetyl-2 ,2 ,6,6-tetramethylpiperidi n-4-yI acetate trimellitic acid tri (2,2,6,6 -tetramethyl p iper id in-4-yl) ester 9%20) 1-acryloyl-4- benzyloxy-2 ,2 ,6,6-tetramethylpi peridinte 21) diethylmalonic acid di(2,2,6,6-tetramethylpiperidin-4-yl) ester dibutylmalonic acid di(1,2,2,6,6-pentamethylpiperidin-4-yl) ester to 23) butyl-(3,5-di-tert-butyl-4-hydroxybenzyl)-malonic acid di(1,2,2,6,6pentamethyl pi perid in-4-yl) ester too. 24) dlibenzyl-malonic acid di(l,2,2,6,6-pentamethylpiperidin-4-y) ester dibetizyl-malonic acid di (1, 2 ,3,6 -tetramethyl -2,6-d iethyl -pi perid i n4yl) ester 26) hexane-1',6'-bi s( 4 -carbamoyloxy-1-n-butyl-2,2,6,6-tetramethyk-piperidine) 27) toluene-2',4'-bi s(4-carbamoyloxy- 1-ti-propyl- 2,2,6 ,6-tetramethylpiperidine) 28) dimethyl-bis(2,2,6,6-tetramethylpi peridi n-4oxy)si lane 29) phenyl-tris(2 ,2 ,6,6-tetramethylpi peridi n-4-oxy)si lane tris(I-propyl- 2 ,2,6,6-tetramethylpiperidin-4yl) phosphit-e 31) tris(1-propyl-2 ,2 6 ,6-tetramethylpi peridi n-4-yl) phosphate 32) phenyl-[bis( ,2 ,2 6 ,6-pentamethylpi peridi n-4-yl)] phosphonate 33) 4 -hydroxy-l,2,2,6,6-pentamethylpiperidine 34) 4-hydroxy-N-hydroxyethyl.2 ,2 6 ,6-tetramethylpi peridi ne 4-hydroxy-N-(2-hydroxypropyl)-2,2 ,6,6-tetramethylpi peridi ne 36) l-glycidyl-4-hydroxy-2 ,2 ,6, 6 -tetramethylpiperidi ne b) Compounds of formula (III)

H

3 C

CH

3 R3 RT-Nj

_N-

H

3 C OH 3 wherein 0. 0:n is the number 1 or 2, Ris as defined for a), Ris hydrogen, C1-Cl2alkyl, C2-Cshydroxyalkyl, C5-C7cycloalkyl, C7a. C8aralkyl, C2-Cl8alkanoyl, C3-C5alkenoyl or benzoyl, and, when n is 1, R 4 is hydrogen, Cl-C18alkyl, C3-C8alkenyl, C5-C7cycloalkyl, Cj- C4alkyl substituted by a hydroxy, cyano, alkoxycarbonyl or carbamide group, giycidyl, a group of the formula -CH2-CH(OH)-Z or of the formula -CONR-Z, wherein Z is hydrogen, methyl or phenyl; and, when n is 2, R 4 is C2-Cl2alkylene, ~2.C6-Cl2arylene, xylylene, a -CH2-CH(OH)-CH2- group or a group -CH2-CH(OH)wherein [t is C2-Cloalkylene, C6-Clsarylene or C6- C12cycloalkylene, or, with the proviso that R~ is not alkanoyl, alkenoyl or benzoyl, R4may also be a divalent radical of an aliphatic, cycloaliphatic or aromatic dicarboxylic acid or dicarbamic acid or also the group -CO- or, when n is 1, R& 3 and R 4 together may be the divalent radical of an aliphatic, cycloaliphatic or aromatic 1,2- or 1,3-dicarboxylic acid.

When any of the substituents are CI-C12- or C1-C18-alkyl, they are as already def ined above under a).

When any of the substituents are C5-C7cycloalkyl, they are especially cyclohexyl.

As C7-C8aralkyl, R3 is especially phenylethyl or more especially benzyl. As

R

3 is especially 2-hydroxyethyl or 2 -hydroxypropyl.

R3as C2-Cl8alkanoyl is, for example, propionyl, butyryl, octanoyl, dodlecanoyl, hexadlecanoyl, octadlecanoyl, but preferably acetyl, and as C3kenoyl is especially acryloyl.

When R 4 is C2-C8alkenyl, then it is, for example, allyl, methallyl, 2-butenyl, 2-pentenyl, 2-hexenyl or 2-octenyl.

R4as C1-C4alkyl substituted by a hydroxy, cyano, alkoxycarbonyl or carbamide group may be, for example, 2-hydroxyethyl, 2 -hydroxypropyl, 2cyanoethyl, methoxycarbonylmethyl, 2 -ethoxycorbonylethyl, 2aminocarbonylpropyl or 2 -(dimethylaminocarbonyl)-ethyl.

When any of the substituents are C2-Cl2alkylene, they are, for example, ethylene, propylene, 2 2 -dimethylpropylene, tetramethylene, hexamethylene, octamethylene, decamethylene or dodecamethylene.

When any of the substituents are C6-Cl5arylene, they are, for example, o-, m- or p-phenylene, l,4-naphthylene or 4,4'-diphenylene.

As C6-Cl2cycloalkylene, b) is especially cyclohexylene.

.:The following compounds are examples of polyalkylpiperidline compounds of that class: 37) N,N'-bis(2 ,2 ,6, 6 -tetramethylpiperidi n- 4 -yl)hexamethylene-1,6-diami ne 38) N,N'-bis(2 ,2 ,6, 6 -tetramethylpiperidi n-4-yl)hexamethylene I ,6-diacetamide .:foe:and 1,6-diformamide 39) I-ctl4(-ylhxlctmdo-,,,-ermtypprdn 4 -benzoylamino2,2,6,6tetramethylpiperidine *41) NN-i(,,,-ermtypprdn4y)NN-iuy-dpmd 17 42) NN'-bis( 2 2 6 6-tetramethylpiperidin.4.yly.NNt-dicyclohexyl-2 hydroxypropylene-1 ,3-diami ne 43) N,'bs2266ttaehlierdn4y)pxlln-imn 44) N,N'-bis(2,2 6 6 -tetramethylpiperidin-4-yI)succine-diamide

N-(

2 2 6 6 -tetramethyl pi peridi n4-yl)-ami nod ipropioni c acid di(2,2,6,6tetramethylpiperidin-4-yl) ester 46) the compound of the formula CH3OH 3 OH

H

CHi--N

N-CH

2

-CH(OH)-CH---O

OH

3

OH

3 CH--

;CH

3

OH

3

OH

3 OHS- N N-CH 2 -CH(OH)-CHi---O

U

4

H

9

OH

3 OH 3 47) 4 -(bis- 2 -hydroxyethyl-amino)41,2,2,66-pentamethylpiperidine 48) 4 3 -methyl-4-hydroxy-5-tertbutyl.benzoic acid amido)-2,2,6,6tetramethylpiperidline 49) 4-methacrylamido-1 ,2,2 ,6 ,6-pentamethylpi peridi ne c) Compounds of formula (IV) I*

H

3 0

OH

3 0 n wherein n is the number I or 2, 18 P1 1 is as defined under a) and, when n is 1, R5 is C2_C8alkylene or C2-C8hydroxyalkylene or C4- C22acyloxyalkylene, and, when n is 2, R5is the group (-CH2)2C(CH2-)2.

When R 5 is C2-C8alkylene or C2-C8hydroxyalkylene, it is, for example, ethylene, I -methyl -ethylene, propylene, 2 -ethyl -propylene or 2-ethyl-2hydroxymethylpropylene.

As C4-C22acyloxyalkylene, R5 is, for example, 2-ethyl-2acetoxymethyl pro py lene.

The following compounds are examples of polyalkylpiperidine compounds of that class: 9-aza-8 ,8 ,i0,l0-tetramethyl-l ,5-dioxaspiro[5.5]undecane 51) 9-z-881,0ttaehl-3-thl-15doap dcn 52) 8-aza-2 ,7,7,8 ,9,9-hexamethyl-1 4 53) 9 -aza- 3-hydroxymethyl- 3-ethyl- 8 ,8 ,9 ,I0, 0-pentamethyl-l 54) 9 -aza- 3 -ethyl-3-acetoxymethy[9-acetyl.8 1 8 1 0 ,lO-tetramel-hyl-i 2 2 6 6 -tetramel-hylpiperidine-4-spiro-2'-(1',3 '-dioxane)-5' *"do a e io- '2 '6 '6 'ter m t ypp rdn d) Compounds of formulae VA, VR and VC 3 C CH. 1 6 N--0 F -N

__I(VA)

3 0 H 3 O H 3

T

11

H

3

CH

3

H

RN R

(VC)

n wherein n is the number 1 or 2, ,Ii s as def ined u nder a), Ris hydrogen, C1-Cl2alkyl, allyl, benzyl, glycidyl or C2-C6alkoxyalkyl and, when n is 1, R 7 is hydrogen, CI-C12alkyI, C3-C5alkenyl, C7-Cgaralkyl, C7cycloalkyl, C2-C4hydroxyalkyl, C2-C6alkoxyalkyl, C6-ClOaryI, glycidyl or a group of the formula -(CH2)P-COO-Q or of the formula -(CH2)p-O-CO-Q, wherein p is 1 or 2 and Q is CI-C4alkyl or phenyl, and, when n is 2, R 7 is C2- C12alkylene, C4-Cl2alkenylene, C6-Cl2arylene, a group -CH2-CH(OH)-CH2-O-b)- O-CH2-CH(OH)-CH2-, wherein D is C2-Cloalkylene, C6-Cl5arylene, C6- C12cycloalkylene, or a group -CH2CH(OZ')CH2-(OCH2-CH(OZ')CH2)2- wherein Z' is hydrogen, CI-Cl8alkyl, allyl, benzyl, C2-Cl2alkanoyl or benzoyl, TI and T2 are each independently of the other hydrogen, C1-Cl8alkyl, or unsubstituted or 0*00 halo- or C1-C4al kyl -substituted C6-Cloaryl or C7-Cgaralkyl, or Ti and T2 together with the carbon atom that binds them form a C5-Cl2cycloalkane ring.

When any of the substituents are CI-Cl2alkyl, they are, for example, methyl, ethyl, n-propyl, n-butyl, sec-butyl, tert-butyl, n-hexyl, n-octyl, 2-ethyl-hexyl, nnonyl, n-decyl, n-undecyl or n-dodecyl.

Any substituents having the definition of CI-Ci8alkyl may be, for example, the groups listed above and in addition, for example, n-tridecyl, n-tetradecyl, nhexadecyl or n-octadecyl.

When any of the substituents are C2-C6alkoxyalkyl, they are, for example, methoxymethyl, ethoxymethyl, propoxymethyl, tert- butoxymethyl, ethoxyethyl, ethoxypropyl, n-butoxyethyl, tert-butoxyethyl, isopropoxyethyl or propoxypropyl.

When R 7 is C3-C5alkenyl, it is, for example, 1-propenyl, allyl, methallyl, 2butenyl or 2-pentenyl.

As C7-Cgaralkyl, R Ti and T2 are especially phenethyl or more especially benzyl. When Ti and T2 together with the carbon atom form a cycloalkane ring, that ring may be, for example, a cyclopentane, cyclohexane, cyclooctane or cyclodlodecane ring.

When R~ 7 is C2-C4hydroxyalkyl, it is, for example, 2-hydroxyethyl, 2hydroxypropyl, 2-hydroxybutyl or 4-hydroxybutyl.

As C6-Cioaryl, R7 Ti and T2 are especially phenyl, a- or r-naphthyl, which are unsubstituted or substituted by halogen or by Ci-C4alkyl.

When R 7 is C2-Ci2alkylene, it is, for example, ethylene, propylene, 2,2dimethylpropylene, tetramethylene, hexamethylene, octamethylene, dlecamethylene or dodecamethylene.

As C4-Ci2alkenylene, R~ 7 is especially 2-butenylene, 2-pentenylene or 3hexenylene.

:.When R7 is C6-Ci2arylene, it is, for example, m- or p-phenylene, 1,4naphthylene or 4,4'-diphenylene.

When Z' is C2-Ci2alkanoyl, it is, for example, propionyl, butyryl, octanloyl, dodlecanoyl, but preferably acetyl.

b) as C2-CiOalkylene, C6-Ci5arylene or C6-Ci2cycloalkylene is as defined under b).

The following compounds are examples of polyalkylpiperidine compounds of that class: 56) 3 -benzyl-i,3,8-triaza-7,7,9,9-tetramethylspiro[45]decane2,4dione 57) 3-n-octyl-i ,3 8 -triaza-7,7,9,9-tetramethylspiro[4.5]decane-2,4-dione 58) 3-al lyl -1 3 8 -triaza-I1, 7 7 ,9,9-pentamethylspi ro [4.5]decane24dione 59) 3 -glycidyl-l, 3 8 -triaza-7,7,8,9,9-pentamethylspiro[45]decane-24-dione

I,

3 ,7, 7 8 9 9 -heptamethyl-1,3,8-triazaspiro[45]decane-24.dione 61) 2- isopropyl-7,7,9 ,9-tetrame-hyl-1-oxa-3 8 -diaza-4-oxo-spiro[4.5]decane 62) 2,2 -di butyl-7,7,9 ,9-tetramethyl-1-oxa-3 8 -diaza-4-oxo-spiro[4.5jdecane 63) 2 2 4 4 -tetramethyl -7-oxa 320d iaza-2 1 oxo-d is p iro[(5.112]hen icosane 64) 2-butyl-7,7,9 9 -tetramethyl-l-oxa-4,8-diaza3oxo-spiro[4.5]decane 8-acetyl-3-dodecyl-1 ,3 ,8-triaza-7,7,9 ,9-tetramethylspi ro [4.5]decane-2 ,4d io ne or the compounds of the following formulae: CH 3

OH

3

CH

3

CH

3 NH-00O 0=0 CHi--N I

N-OH

3 C-N -CH 2 OH(0H)0H 2

-[OCH

2

-CH(OH)CH

2 2 N -0 66) C3C 00CH 3

O

3 67) OH 3

OH

3 OH 3 OH 3 *NH-O=O

O-C-NH

OH-N IIN-OH 3

OH

3 OH3 H3C 68)

OH

3

OH

3 C

H

HN IH0 N -NH

H

CH~~ OH H 3

OH

3 69) HN 0 (OH) 1 O- H 0 2 00 12 2

OH

3 0 e) Compounds of formula VI [9

(VT),-H

wherein n is the number 1 or 2 and R 8 is a group of the formula CH 3

CH

3 -E-(A)N-R1

CH

3 CH 3 wherein Ris as defined under a), E is or -NR 11 A is C2-C6alkylene or -(CH2)3-0- and is the number 0 or 1, Ris identical to R 8 or is one of the groups -NPIt P 12

OPI

13 -NHCH2OP 13 or -N(CH20P 13 )2, when n Ri 0 is identical to P 8 or R 9 anwen=2,Roiagru E8 wherein B is C2-C6alkylene that is uninterrupted or interrupted by -N(P 11

)-I

R1is C1-C12alkyl, cyclohexyl, benzyl or C1-C4hydroxyalkyl or a group of the formula PI CCH 3

CH

2

R

S.R

CH2R PI 2 is C1-Cl2alkyl, cyclohexyl, benzyl, Cl-C4hydroxyalkyl and

R

13 is hydrogen, Cl-Cl2alkyl or phenyl, or

R

11 and R 12 together are C4-C5alkylene or C4-C50xaalkylene,

-OH

2

CH

2 0o C 2 H

-OH

2 2 for example ,or are a group of the formula

-C

2

CH

2 0 -22

-CH

2

CH

2

N-R

-CIH CH-1 2 2 or alternatively R11 and R 12 are each a group of the formula

OH

3

OH

3 .fl 0 0 0 O H 3 When any of the substituents are C1-Cl2alkyl, they are, for example, methyl, ethyl, n-propyl, n-butyl, sec-butyl, tert-butyl, n-hexyl, n-octyl, 2-ethylhexyl, nnonyl, n-decyl, n-undecyl or n-dodecyl.

When any of the substituents are CI-C4hydroxyalkyl, they are, for example, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 2-hydroxybutyl or 4hydroxybutyl.

When A is C2-C6alkylene, it is, for example, ethylene, propylene, 2,2dimethylpropylene, tetramethylene or hexamethylene.

When R 11 and R 12 together are C4-C5alkylene or C4-C50xaalkylene, they are, for example, tetramethylene, pentamethylene or 3 -oxapentamethylene.

The compounds of the following formulae are examples of polyalkylpiperidine compounds of that class: OH3 I3

H

3 0

H

3 0

OCH

3 N-O4

H

N ~N (CH 3 CH A 2 N N N(CH 2

CH

3 2 N (04 H 9 2

OH

3

OH

3 O'J' H 3 OH 3 71 0C 2

H

5 -N N N Nq-0 2

H

O2H

OHC

OH OH 3 25H 3

OH

3 0 *00060 0 .0e0 0000 0000 0

S.

0 0

S.

S.

0 9 9600 00 a 0 900@ 0@ S. 0 S

U

0009 0 9000..

S

72)

R

NJN

R 'I N R H 3 C

OH

3

-NH-H

2 2 2 N-OH 3

H

3 O H 3 wherein R 73) CH 3 ,0/H 3

OH

3

OH

3

CH

2

-CH

2

NH

NH

OH

3

OH

3 N H3 C3 0CH 2 -0H 2 -NH--l -LNH-CHZCOH 2

NH

N

OH

3

O

3 OH' O H 74) *000 0 *0 CH, OH, N N C H -N

HH

OH

3 3

N

H

R

R

Rill.H 2 3

J-(CH

2 N -(0H 2 3

-NH-R

OH

3 OH 3 N NH N NH

OH

3

OH

3 0 4

H

9

-N

CH

3

NC

N H N

OH

3 OCH 3 Nd C3

H

,wherein R is

CH,

76) R

R

R-NH-(CH

2 3 -N C 2 )I -N-(C 2 3

-H-R

N

N N wherein R

CH

3 a.

a a a 9* a *aaa..

77 H~ 3r RR CH 3 R-NI (OH 2

(CH

2 N 1 N -R

OH

3 OH 3 N C 4

H

9 N

N-OH

3 N N wherein R~ C

OH-N

OH

3 OCH 3

OH

3 N

OH

3

OH

3 27

OH

3 OH 3 C H 1 -N

NH

N N 78)CH 3

OH

3 CAHj-N) N- NH(Cl 2)3 CH 3 OH 3

OH

3 CH3

H

2

CH

2

CH

2

OH

H

3 N O 3

OH

3 OH 3 79)

N-O

4

H

9

OH

3

OH

3 N k HO-OH 2

OH

2 -N N N N- CH OH3 3 28

CH

2 -CH=CH 2 HC N CH 3

H

3 C N H 3 N-C4 H HG O H 3 N N CH 3 OH3 H CH 2 C-N -N N N N-H2=2 I 1 OH OHC

H

3

O

3 OH 3

OH

3 f) Oligomeric or polymeric compounds, the structural repeating unit of which contains one or more 2 2 ,6,6-tetraalkylpiperidine radicals of formula especially polyesters, po Iyethers, po lyam ides, po lyam ines, polIyurethanes, po lyureas, p0 lyam inotriazi nes, p0 ly(meth)acrylates, po lysi loxanes, po ly(meth)acrylam ides and the copolymers thereof that contain such radicals.

Examples of 2 2 ,6,6-polyalkylpiperidine light stabilisers of that class are the compounds of the following formulae wherein m is a number from 2 to approximately 200.

OH 3 CH 3 0 0 81)Ur f-CH-CHi-C-o-oHi

-OH-N

8 )L2 2 2 OH 3 OH 3 82) -f-H 2

-CH

2 -N 0- C-(CH 2 4 -OC- 0< NCC 2 0C3-- CH H, C, CH EF-- NI 83) 84) 4- N

CH

2

-CH(OH)-CH

2 m

OH

3 OH 3

OH

3 C H H3 a a a.

a a a a a a. a 86) 'C3 CH3N /OH 3 0 O4H 9 0 O4H9 OH 3

OH

CH3 87) NC49 H H~rXO OH 3 H OF

OH

3 OH 3

OH

3 H OH

OH

3

OH

3

OH

3

H

88) 0- N-OH 2 0C 2 -N 0-C- (0H 2 4

-C

OH

3

OH

3 OH 3 OH 3 0 CAH 0OH O 3 89) C-C- H2-N 0 C H 3

OH

3

OH

3 90) OHC 3

O

3 m o

N-OH

3 *c

H

OH

3

O

3 CH3 91

OH

3

CH

3 m 6 H 13 -N

N-OH

3

OH

3

OH

3

N

m

OH

3

OH

3 OH 3

OH

3

OH

3 N H 3

OH

3 N H 3 H H N (O 2 6 -N -OH2-OH2m 93)

OH

3 OH 3

OH

3 OH 3

OH

3 NNN. OH 3 OH3 N H

HHH

*0 0

.N-(OH

2 6 N-C00Hi- 94) C H 3

OH

3

OH

3

OH

3 CH O 3 N OH 3

OH

3 NJ OH 3 CH 3 (OH1 2 3 n wherein R H or CH3

OH

3

CH

3

CH

3

H

9 c 4

(R)N

96) H 9 0 4

(R)N-

N(R)C4H9 a a a a.

a a a a a.

p. a a a

OH

3 wherein R=

H

9 0 4 (R)N -~-Njl

N(R)C

4 H 9 and R'= or H (obtainable by reacting the reaction product of trichiorotriazine and NH-2- (CH2)3-NH-(CH2)2-(CH2)3-NH2 with 4 -N-butyl-2,2,6,6-tetramethylpiperidine} Of those classes, classes e) and f) are especially suitable, especially those tetraalkylpiperidline compounds that contain s-triazine groups. Also especially suitable are compounds 74, 76, 84, 87, 92, 95 and 96.

The preparation of the N-piperidlinyl-triazines is known from the literature for example, Houben-Weyl "Methoden der organischen Chemie", Vol. VIUI, p. 233-237, 3rd Ed., Thieme Verlag 5tuttgart 1971). There may be used as starting material for the reaction with various N-piperidylamines cyanuric chloride, diami no-chloro-1,3,5-triazine or variously substituted bisdialkylaminochloro-1,3,5-triazines or dialkylamino- or alkylamino-dichloro-1,3,5-triazines.

Technically important examples of tetra- and penta-alkylpi peridline compounds are: bis(2,2,6,6-tetramethyl-piperidyl) sebacate, bis(2,2,6,6tetramethyl -pi peridyl) succi nate, bis(1 ,2,2 ,6,6-pentamethylpiperidyl) sebacate, n-butyl-3,5-di-tert-butyl-4-hydroxybenzyl-malonic acid bis(1,2,2,6,6pentamethylpi peridyl) ester, the condensation product of 1-hydroxyethyl- 2,2,6 ,6-tetramethyl-4-hydroxy-piperidi ne and succi nic acid, the condensation product of N,N'-bis(2 ,2 ,6,6-tetramethyl-4-pi peridyl)-hexamethylenediami ne and 4-tert-octylami no-2 ,6-di ch loro-1 ,3 ,5-s-triazi ne, tris(2 ,2 ,6,6-tetramethyl-4pi peridyl)nitri lotriacetate, tetrakis(2 ,2,6 ,6-tetramethyl-4-piperidyl)-1 ,2 ,3,4butanetetraoate, ,2-ethanediyl)-bis(3 ,3 ,5,5-tetramethyl-piperazi none), 4benzoyl-2 ,2 ,6,6-tetramethylpi peridi ne, 4-stearyloxy- 2,2,6,6tetramethylpiperidline, bis(l, 2 ,2,6,6-pentamethylpiperidyl)-2-n-butyl-2-(2hydroxy-3 ,5-di -tert-butylbenzyl) malonate, 3-n-octyl-7,7,9 ,9-tetramethyl- 1,3,8-triazaspiro[4.5]decane-2 ,4-dione, bis(1-octyloxy-2,2,6,6tetramethylpi peridyl) sebacate, bis(1-octyloxy-2 ,2 ,6,6-tetramethylpi peridyl) succi nate, the condensation product of N,N'-bis(2 ,2 ,6,6-tetramethyl-4pi peridyl)hexamethylenediami ne and 4-morpholi no-2 ,6-di ch loro-1 ,3 ,5-triazi ne, the condensation product of 2-chloro-4,6-di(4-n-butylamino-2,2,6,6tetramethylpiperidyl)-1,3 ,5-triazine and 1,2-bis(3-aminopropylamino)ethane, the condensation product of 2-chloro-4,6-di(4-n-butylamino-1,2,2,6,6pentamethylpiperidyl)-l,3,5-triazine and 1 ,2-bis(3-aminopropylamino)ethane, 8acetyl -3 -dodecyl-7,7,9 ,9-tetramethyl-1 ,3 ,8-triazaspi ro [4.5]decane-2 ,4-dione, 3 -dodecyl-l-(2,2,6,6-tetramethyl-4-piperidyl)pyrrolidine..2,5-dione, 3-dodecyl- 1- (1,2 ,2,6 ,6-pentamethyl -4-pi per idyl)- pyrro Iid i ne- 2,5-d io ne.

Instead of a single sterically hindered amine, it is possible within the scope of the present invention also to use a mixture of different sterically hindered amines.

The amount of sterically hindered amine added depends on the desired degree of stabilisation. In general, from 0.01 to 0.5 by weight, especially from 0.05 to 0.5 by weight, based on the polymer, is added.

Hydrotalcites and alkali (alkaline earth) aluminosilicates (zeolites) The chemical composition of these compounds is known to a person skilled in the art, for example from patent specifications DE 38 43 581, US 40 00 100, EP 062 813, WO 93/20135.

Compounds from the hydrotalcite series can be described by general formula

VII

M

2 1-x M 3 +x(OH)2 (Ab-)x/b d H20 (VII) wherein

M

2 one or more of the metals from the group Mg, Ca, Sr, Zn or Sn,

M

3 Al, or 8, An is an anion having the valency n, b is a number from 1 to 2, 0 <x E 0.5, and m is a number from 0 to Preferably, An CIO4-, HC03-, CH3COO-, C6H5COO-, C032- (CHOHCOO)22, (CH2COO)22-, CH3CHOHCOO-, HPO3or HP04 2 Examples of hydrotalcites are Al2O3.6MgO.CO2.12H2O Mg4,5A12(OH)13.C03.3.5H 2 0 00i, 4MgO.Al2O3.CO2.9H20 (iii), 4MgO.Al2O3.CO2.6H2o, ZnO.3MgO.Al2O3.CO 2 .8- 9H20 and ZnO.3MgO.AI2O3.CO2.5-6H 2 0. Special preference is given to types i, ii and iii.

Zeolitfes (alkali and alkaline earth aluminosilica tes) These can be described by general formula (VIII) Mx/n[(A102)x(5i02)y].wH2O

(VIII)

wherein n is the charge of the cation M; M is an element of Group I or Group II, such as Li, Na, K, Mg, Ca, 5r or Ba; y-.x is a number from 0.8 to 15, preferably from 0.8 to 1.2; and w is a number from 0 to 300, preferably from 0.5 to Examples of zeolites are sodium aluminosilicates of the formulae Nal2AI12SiI2O48. 27 H20 [zeolite Na6Al6Si6O24. 2 NaX. 7.5 X= OH, halogen, C104 [sodalite]; Na6Al6Si300 7 2 24 H20; Na8Al85i40096.

24 H20; Na16AlI6Si24080. 16 H20; Na16A116i32O96. 16 Na56Al565i136O38 4 250 H20 [zeolite Na86AI86Si1O6O 384 264 [zeolite X]; or the zeolites that can be formed by partial or complete replacement of the Na atoms by Li, K, Mg, Ca, Sr or Zn atoms, such as 2.(Na,K)10Al10i22O64. 20 H20; Ca4.5Na3[(AI02)12(SiO 2 12 30 K9Na3 102)12(5i02)12]. 27 Preferred zeolites correspond to the formulae SNa12All 2 Sil 2

O)

48 27 H20 [zeolite

A],

Na6Al6Si6O2 4 2NaX. 7.5 H20, X =OH, Cl, C104, l/2C03 [sodalite] Na6Al6Si300 72 24 Na8AI8Si40096 24 Na16AlI65i24080. 16 Na16A116Si32O 9 6 .16 _i Na56A156Si1360384 250 H20 [zeolite Y] Na86Al86Si106384. 264 H20 [zeolite X] and zeolites of the X ad Y type possessing an AI/Si ratio of about 1:1, or the zeolites that can be formed by partial or complete replacement of the Na atoms by Li, K, Mg, Ca, Sr, Ba or Zn atoms, such as (Na,K)10All0Si2264. 20 Ca4,5Na3[(A102)12(Si02)12]. 30 K9Na3[(A102)12(Si2)12]. 27 The zeolites listed may also have a lower water content or may be anhydrous.

Other suitable zeolites are: 2 0 3 to 5) Si0 2 to 10) H20 [zeolite P] Na20-A120 3 -2 Si02.(3.5-10)H 2 0 (zeolite MAP) or the zeolites that can be formed by partial or complete replacement of the Na atoms by Li, K or H atoms, such as (Li,Na,K,H)1 0 A110Si 2 2 0 6 4 20 K9Na3[(AI1O 2 12 (SiO 2 12 27 H 2 0

K

4 Al 4 Si 4 1 6 -6 H20 [zeolite K-F] Na81A 8 5i 4 0 0 9 6 .24 H 2 0 zeolite D, as described in Barrer et al, J. Chem.

Soc. 1952, 1561-1571, and in US 2 950 952; The following zeolites are also suitable: potassium offretite, as described in EP-A-400 961; zeolite R, as described in GB 841 812; zeolite LZ-217, as described in US 4 503 023; Ca-free zeolite LZ-218, as described in US 4 333 859; zeolite T, zeolite LZ-220, as described in US 4 503 023; Na 3

K

6 A95i 2 70 72 .21 H20 [zeolite L]; zeolite LZ-211, as described in US 4 503 023; zeolite LZ-212, as described in US 4 503 023; zeolite O, zeolite LZ-217, as described in US 4 503 023; ol zeolite LZ-219, as described in US 4 503 023; Szeolite Rho, zeolite LZ-214, as described in US 4 503 023; zeolite ZK-19, as described in Am. Mineral. 54 1607 (1969); 1_ zeolite W as described in Barrer etal., J. Chem. Soc. 1956, 2882; Na 3 0 A1 3 0 5i660 19 2 98 H20 [zeolite ZK-5, zeolite Q].

Special preference is given to the use of zeolite P types of formula I wherein x is from 2 to 5 and y is from 3.5 to 10, especially zeolite MAP of formula I wherein x is 2 and y is from 3.5 to 10, and very especially zeolite Na-P, that is to say M is Na. That zeolite generally occurs in variants Na-P-1, Na-P-2 and Na-P- 3, which are differentiated by their cubic, tetragonal or orthorhombic structure Barrer, B.M. Munday, J.Chem.Soc. A 1971, 2909-2914). The literature just mentioned also describes the preparation of zeolite P-1 and P-2.

According to that publication, zeolite P-3 is very rare and is therefore of little practical interest. The structure of zeolite P-1 corresponds to the gismondite structure known from the above-mentioned Atlas of Zeolite Structures. In more recent literature (EP-A 384 070) a distinction is made between cubic (zeolite B or Pc) and tetragonal (zeolite P 1 zeolites of the P type. That publication also mentions relatively new zeolites of the P type having Si:AI ratios of less than 1.07:1. Those are zeolites designated MAP or MA-P for "Maximum Aluminium P".

Depending upon the preparation process, zeolite P may contain small quantities of other zeolites. Very pure zeolite P has been described in WO 94/26662.

Within the scope of the invention it is also possible to use finely particulate, water-insoluble sodium aluminosilicates which have been precipitated and crystallised in the presence of water-soluble inorganic or organic dispersants.

Those compounds can be introduced into the reaction mixture in any desired manner before or during the precipitation and/or the crystallisation.

Sodium zeolite A and sodium zeolite P are very especially preferred.

The hydrotalcites and/or zeolites can be used in amounts of, for example, S. from 0.1 to 20, advantageously from 0.1 to 10, and especially from 0.1 to 5, parts by weight, based on 100 parts by weight of halogen-containing polymer.

Alkali aluminocarbonates (dawsonites) *o These are compounds of the formula {(M20)m.(Al203)n.Zo.pH20}, wherein M is H, Li, Na, K, Mgl/2, Cal/2, Srl/2 or Znl/2; Z is CO2, SO2, (C1207)1/2, 8406, 5202 (thiosulfate) or C202 (oxalate); m is a number from 1 to 2 when M is Mg1/2 or Cal/2, and in all other cases is a number from 1 to 3; n is a number from 1 to 4; o is a number from 2 to 4; and p is a number from 0 to The alumino salt compounds of formula that can be used according to the invention may be naturally occurring minerals or synthetically prepared compounds. The metals may partially replace one another. The mentioned alumino salt compounds are crystalline, partially crystalline or amorphous or may be present in the form of a dried gel. The alumino salt compounds may also be present in relatively rare crystalline modifications. A process for the preparation of such compounds is described in EP 394 670. Examples of naturally occurring alumino salt compounds are indigirite, tunisite, aluminohydrocalcite, para-aluminohydrocalcite, strontiodresserite and hydrostrontiodresserite. Other examples of alumino salt compounds are potassium aluminocarbonate {(K20).(A1203).(CO2)2.2H20}, sodium aluminothiosulfate {(Na20).(A1203).(S202)2.2H20}, potassium aluminosulfite {(K20).(A1203).(SO2)2.2H20}, calcium aluminooxalate ((CaO).(A1203).(C202)2.5H20}, magnesium aluminotetraborate {(MgO).(Al203).(B406)2.5H20}, (([Mg0.2Na0.6]20).(Al203).(CO2)2.4.1H20}, {([Mg0.2Nao.6120).(A1203).(CO2)2.4.3H20} and {([Mg0.3Na0.4120).(A1203).(C02)2.2.4.9H20}.

The mixed alumino salt compounds can be obtained in accordance with processes known per se by cation exchange, preferably from the alkali alumino :I salt compounds or by combined precipitation (see, for example, US 5 055 284).

Preference is given to alumino salt compounds of the above formula wherein M is Na or K; Z is C02, 502 or (C1207)1/2; m is 1-3; n is 1-4; o is 2-4 and p is 0-20. Z is especially C02.

Preference is given also to compounds that can be represented by the following formulae: M20.A1203.(C02)2 pH20 (Ia) (M20)2.(A1203)2.(CO2)2 pH20 (Ib) M20.(A1203)2.(C02)2 pH20 (Ic) wherein M is a metal, such as Na, K, Mgl/2, Cal/2, Srl/2 or Znl/2 and p is a number from 0 to 12.

Special preference is given to sodium aluminodihydroxycarbonate (DASC) and to the homologous potassium compound (DAPC).

bawsonites may also be substituted by lithiumalumohydroxycarbonates or lithium-magnesium-alumohydroxycarbonates, as described in EP 549,340 and bE 4,425,266.

The dawsonites can be used in an amount of, for example, from 0.01 to advantageously from 0.1 to 3, especially from 0.1 to 2, parts by weight, based on 100 parts by weight of halogen-containing polymer.

The stabiliser combination preferably comprises component A) and, as component at least one substance from the following groups: perchlorate compounds, glycidyl compounds, or dihydropyridines and polydihydropyridines.

The stabiliser combination according to the invention can be used together with further additives that are customary for the processing and stabilisation of chlorine-containing polymers, such as: Zinc compounds The organic zinc compounds having a Zn-O bond are zinc enolates and/or zinc carboxylates. The latter are, for example, compounds from the series of aliphatic saturated C2-C22carboxylates, aliphatic unsaturated C3- C22carboxylates, aliphatic C2-C22carboxylates that are substituted by at least one OH group or the chain of which is interrupted at least by one oxygen atom (oxa acids), cyclic and bicyclic carboxylates having from 5 to 22 carbon atoms, phenylcarboxylates that are unsubstituted, substituted by at least one OH group and/or C1-C16alkyl-substituted, phenyl-C1-C16alkylcarboxylates, or phenolates that are unsubstituted or C1-C12alkyl-substituted, or abietic acid.

There may be mentioned specifically, as examples, the zinc salts of monovalent carboxylic acids, such as acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, oenanthic acid, octanoic acid, neodecanoic acid, 2ethylhexanoic acid, pelargonic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, myristic acid, palmitic acid, lauric acid, isostearic acid, stearic acid, 12-hydroxystearic acid, 9,10-dihydroxystearic acid, oleic acid, 3,6dioxaheptanoic acid, 3,6,9-trioxadecanoic acid, behenic acid, benzoic acid, ptert-butylbenzoic acid, dimethylhydroxybenzoic acid, 3,5-di-tert-butyl-4hydroxybenzoic acid, toluic acid, dimethylbenzoic acid, ethylbenzoic acid, npropylbenzoic acid, salicylic acid, p-tert-octylsalicylic acid, and sorbic acid; zinc salts of divalent carboxylic acids or the monoesters thereof, such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, dicarboxylic acid, hexane-1,6-dicarboxylic acid, heptane-1,7-dicarboxylic acid, octane-1,8-dicarboxylic acid, 3 ,6,9-trioxadecane-l,10-dicarboxylic acid, lactic acid, malonic acid, maleic acid, tartaric acid, cinnamic acid, mandelic acid, malic acid, glycolic acid, oxalic acid, salicylic acid, polyglycol-dicarboxylic acid 12), phthalic acid, isophthalic acid, terephthalic acid and hydroxyphthalic acid; and the di- or tri-esters of tri- or tetra-valent carboxylic acids, such as hemimellitic acid, trimellitic acid, pyromellitic acid, citric acid and also so-called overbased zinc carboxylates.

The zinc enolates are preferably enolates of acetylacetone, benzoylacetone or dibenzoylmethane and enolates of acetoacetates and benzoyl acetates and of dehydroacetic acid. In addition, inorganic zinc compounds, such as zinc oxide, zinc hydroxide, zinc sulfide or zinc carbonate, can also be used.

Preference is given to zinc carboxylates of a carboxylic acid having from 7 to carbon atoms (zinc soaps), such as benzoates or alkanoates, preferably C8alkanoates, stearate, oleate, laurate, palmitate, behenate, versatate, hydroxystearates, dihydroxystearates, p-tert-butylbenzoate, or (iso)octanoate.

Preference is given especially to stearate, oleate, versatate, benzoate, p-tertbutylbenzoate and 2 -ethylhexanoate.

Also suitable in addition to the mentioned zinc compounds are organic aluminium, cerium or lanthanum compounds having a metal-O bond. The aluminium compounds that can be used and that are preferred include carboxylates and enolates.

The metal soaps described and mixtures thereof can be used in amounts of, for example, from 0.001 to 10, advantageously from 0.01 to 5, preferably from 0.01 to 3, parts by weight, based on 100 parts by weight of chlorine-containing polymer.

The stabiliser combination can be provided with further stabilisers, auxiliaries and processing agents, such as alkali metal and alkaline earth metal compounds, glidants, plasticisers, pigments, fillers, phosphites, thiophosphites and thiophosphates, mercaptocarboxylic acid esters, epoxidised fatty acid esters, antioxidants, UV absorbers and light stabilisers, optical brighteners, impact strength modifiers and processing aids, gelling agents, antistatic agents, biocides, metal deactivators, fireproofing agents and propellants, and antifogging agents (cf. "Handbook of PVC Formulating" by E. J. Wickson, John Wiley Sons, New York 1993).

In a non-limiting manner, some of the known additives and processing auxiliaries are mentioned here: Alkali metal and alkaline earth metal compounds.

These are to be understood to include especially the carboxylates of the acids described above, but also corresponding oxides or hydroxides or (bi)carbonates. Mixtures thereof with organic acids are also suitable. Examples are NaOH, Na-stearate, NaHCO 3 KOH, K-stearate, KHCO s LiOH, Li 2

CO

3 Listearate, CaO, Ca(OH2), MgO, Mg(OH)2, Mg-stearate, CaCO3, MgCO3 as well as dolomite, huntit, chalk, basic Mg-carbonate and other Na- and K-salts of fatty acids.

NaOH, KOH, CaO, Ca(OH2), MgO, Mg(OH)2, CaCO3 and MgCO3 and also fatty acid sodium and potassium salts.

In the case of alkaline earth metal and zinc carboxylates, it is also possible for their adducts with MO or M(OH) 2 (M Ca, Mg, Sr or Zn), so-called "overbased" compounds, to be used.

Preference is given to alkali metal, alkaline earth metal and/or aluminium carboxylates in addition to the stabiliser combination according to the invention.

Other Metal Stabilisers Special metnion has to be made of organotin stabilisers, carboxylates, mercaptides and Sulfides being preferred. Examples of suitable compounds may be found in US 4,743,640.

42 6lidan ts(L UBRICAN

TS)

Suitable glidants are, for example: Montan wax, fatty acid esters, PE waxes, amide waxes, chloroparaffins, glycerol esters or alkaline earth metal soaps. Suitable glidants are also described in "Kunststoffadditive" (Plastics additives), R. Gdchter/H. MUiller, Carl Hanser Verlag, 3 rd Ed., 1989, pages 478-488. Mention may also be made of fatty ketones (as described in bE 42 04 887) and of silicone-based glidants (as described in EP 225 261) or combinations thereof, as listed in EP 259 783.

Plasticisers Suitable organic plasticisers are, for example, those of the following groups: A) Phthalic acid esters: Examples of such plasticisers are dimethyl, diethyl, dibutyl, dihexyl, di-2ethylhexyl, di-n-octyl, diisooctyl, diisononyl, diisodecyl, diisotridecyl, dicyclohexyl, dimethylcyclohexyl, dimethylglycol, dibutylglycol, benzylbutyl and diphenyl phthalate and mixtures of phthalates, such as C7-C9- and C9- C11i-alkyl phthalates from predominantly linear alcohols, C6-C10-n-alkyl .phthalates and C8-Co10-n-alkyl phthalates. Of those compounds, preference is given to dibutyl, dihexyl, di-2-ethylhexyl, di-n-octyl, diisooctyl, diisononyl, diisodecyl, diisotridecyl and benzylbutyl phthalate and to the mentioned mixtures of alkyl phthalates. Special preference is given to di-2-ethylhexyl, diisononyl and diisodecyl phthalate, which are also known by the customary abbreviations DOP (dioctyl phthalate, di-2-ethylhexyl phthalate),

DINP

(diisononyl phthalate), bIDP (diisodecyl phthalate).

B) Esters of aliphatic dicarboxylic acids, especially esters of adipic, azelaic and sebacic acid: Examples of such plasticisers are di-2-ethylhexyl adipate, diisooctyl adipate (mixture), diisononyl adipate (mixture), diisodecyl adipate (mixture), benzylbutyl adipate, benzyloctyl adipate, di-2-ethylhexyl azelate, di-2ethylhexyl sebacate and diisodecyl sebacate (mixture). Di-2-ethylhexyl adipate and diisooctyl adipate are preferred.

C) Trimellitic acid esters, for example tri-2-ethylhexyl trimellitate, triisodecyl trimellitate (mixture), triisotridecyl trimellitate, triisooctyl trimellitate (mixture) and tri-C6-C8alkyl, tri-C6-Cl0alkyl, tri-C7-C9alkyl and tri-C9-C11alkyl trimellitate. The last-mentioned trimellitates are formed by esterifying trimellitic acid with the appropriate alkanol mixtures. Preferred trimellitates are tri-2-ethylhexyl trimellitate and the mentioned trimellitates from alkanol mixtures. Customary abbreviations are TOTM (trioctyl trimellitate, tri-2-ethylhexyl trimellitate), TIDTM (triisodecyl trimellitate) and TITDTM (triisotridecyl trimellitate).

D) Epoxide plasticisers These are mainly epoxidised unsaturated fatty acids, such as epoxidised soybean oil.

E) Polymer plasticisers A definition of these plasticisers and examples thereof are given in "Kunststoffadditive" (Plastics additives), R. Gdchter/H. Miller, Carl Hanser Verlag, 3 r Ed., 1989, Chapter 5.9.6, pages 412-415, and in "PVC Technology", W.V. Titow, 4 th Ed., Elsevier Publ., 1984, pages 165-170. The most commonly used starting materials for the preparation of polyester plasticisers are: dicarboxylic acids, such as adipic, phthalic, azelaic and sebacic acid; diols, such as 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, "i neopentyl glycol and diethylene glycol.

F) Phosphoric acid esters A definition of those esters is to be found in the above-mentioned "Taschenbuch der Kunstoffadditive" (Handbook of Plastics Additives), Chapter 5.9.5, p.p. 408-412. Examples of such phosphoric acid esters are tributyl phosphate, tri-2-ethylbutyl phosphate, tri-2-ethylhexyl phosphate, trichloroethyl phosphate, 2-ethyl-hexyl-diphenyl phosphate, cresyl diphenyl phosphate, triphenyl phosphate, tricresyl phosphate and trixylenyl phosphate. Tri-2-ethylhexyl phosphate and TMReofos 50 and 95 (Ciba-Geigy) are preferred.

G) Chlorinated hydrocarbons (paraffins) H) Hydrocarbons I) Monoesters, e.g. butyl oleate, phenoxyethyl oleate, tetrahydrofurfuryl oleate and alkylsulfonic acid esters.

J) Glycol esters, e.g. diglycol benzoates.

Definitions and examples of plasticisers of groups G) to J) are to be found in the following handbooks: "Kunststoffadditive" (Plastics Additives), R. Gachter/H. Miiller, Carl Hanser Verlag, 3 rd Ed., 1989, Chapter 5.9.14.2, p.p. 422-425 (group and Chapter 5.9.14.1, p. 422 (group H).

"PVC Technology", W.V. Titow, 4 t h Ed., Elsevier Publishers, 1984, Chapter 6.10.2, pages 171-173, (group Chapter 6.10.5, page 174 (group Chapter 6.10.3, page 173, (group I) and Chapter 6.10.4, pages 173-174 (group J).

It is also possible to use mixtures of different plasticisers.

The plasticisers can be used in an amount of, for example, from 5 to 120, advantageously from 10 to 100, and especially from 20 to 70, parts by weight, based on 100 parts by weight PVC.

Pigments Suitable substances are known to the person skilled in the art. Examples of inorganic pigments are TiO 2 carbon black, Fe20O, Sb 2 0s, (Ti,Ba,Sb)O 2 Cr20 3 spinels, such as cobalt blue and cobalt green, Cd(S,Se), ultramarine blue. Organic pigments are, for example, azo pigments, phthalocyanine pigments, quinacridone pigments, perylene pigments, diketo-pyrrolopyrrole pigments and anthraquinone pigments. Preference is also given to TiO 2 in micronised form.

Definitions and further descriptions are to be found in the "Handbook of PVC Formulating", E.J.Wickson, John Wiley Sons, New York 1993.

Fillers Fillers (HANDBOOK OF PVC FORMULATING, E.J.Wickson John Wiley Sons, Inc., 1993 pp. 393-449) and reinforcing agents (TASCHENBUCH der KA'e (HANDBOOK of Plastics Additives), R.Gdchter H.Muller, Carl Hanser, 1990, pp. 549-615) (such as calcium carbonate, dolomite, wollastonite, magnesium oxide, magnesium hydroxide, silicates, glass fibres, talc, kaolin, chalk, mica, metal oxides and hydroxides, carbon black or graphite).

Chalk is preferred.

Phosphites Examples are triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris-(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl-pentaerythrito I di phosphite, tris(2 ,4-di -tert-butyphenyl) phosphite, di isodecylpentqerythrito I di phosphite, bis(2 ,4-di -tertbutylphenyl)pentaerythritol di phosphite, bis(2 ,6-di-tert-butyl-4-methyl phenyl)pentaerythritol diphosphite, bis-isodecyloxy-pentaerythrito I di phosphite, bis(2 ,4-di -tert-butyl-6-methylphenyl)pentaerythrito I di phosphite, bis(2 ,4,6-tri tert-butylphenyl)peni-aerythrito I diphosphite, tristearyl-sorbito I tri phosphite, bis(2 ,4-di -tert-butyl-6-methylphenyl)methy phosphite, bis(2 ,4-di -tert- butyl-6methylphenyl)ethyl phosphite.

Especially suitable are ticy, tridecyl, tridodlecyl, tritetradecyl, tristearyl, trioleyl, triphenyl-, tricresyl, tris-p-nonylphenyl or tricyclohexyl phosphite and special preference is given to the aryl-dialkyl and alkyl-diaryl phosphites, such as phenyldidecyl phosphite, (2 ,4-di -tert-butylphenyl)-di -dodecyl phosphite, (2,6di-tert-butylphenyl)-di-dodecyl phosphite and to the dialkyl- and diarylpentaerythritol diphosphites, such as distearylpentaerythritol diphosphite, and non-stoichiometric triaryl phosphites, for example those having the composition (H19C9-.C6H4)01.P(C1213H252 7 )l.

Preferred organic phosphites are distearyl-pentaerythritol diphosphite, trisnonyiphenyl phosphite and phenyldidecyl phosphite.

.The organic phosphites can be used in an amount of, for example, from 0.01 to 10, advantageously from 0.05 to 5, and especially from 0.1 to 3, parts by weight, based on 100 parts by weight PVC.

Thiophosphites and thiophosphates There are to be understood by thiophosphites and thiophosphates compounds of the general type:

(RS)

3 P, (RS) 3 P=O or (RS) 3 P=S, which are described in patent specifications LE 28 09 492, EP 090 770 and EP 573 394.

Examples of those compounds are: trithiohexyl phosphit-e, trithiooctyl phosphite, trithiolauryl phosphite, trithiobenzyl phosphite, trithiophosphorous acid tris(carboisooctyloxy)methyl ester, trithiophosphorous acid tris(carbotrimethylcyclohexyloxy)methyl ester, trithiophosphoric acid tris(carboisooctyloxy)methyl ester, trithiophosphoric acid 5,5,5-tris(carbo-2ethyl hexyloxy)methyl ester, trithiophosphoric acid 5,5,5-tris-1- (car bo hexyloxy)-ethyl ester, trithiophosphori c acid 5,S,5-tris-1-(carbo-2ethyl hexyloxy)-ethyl ester, trithiophosphoric acid S,S,5-tris-2 -(carbo-2ethyl hexyloxy)-ethyl ester.

Mercaptocarboxylic acid esters Examples of these compounds are: esters of the thioglycolic acid, thiomalic acid, mercaptopropionic acid, mercaptobenzoic acids or thiolactic acid that are described in patents FR 2 459 816, EP 90 748, FR 2 552 440 and EP 365 483.

The mentioned mercaptocarboxylic acid esters also include polyol esters and the partial esters thereof.

Epoxidised fatty acid esters The stabiliser combination according to the invention may additionally comprise preferably at least one epoxidised fatty acid ester. Especially suitable are esters of fatty acids from natural sources (fatty acid glycerides), such as soya oil or rape oil. It is, however, also possible to use synthetic products, such as epoxidised butyl oleate.

A ntioxidan ts Suitable antioxidants are, for example: 1. Al kylated monopheno Is. for example 2 ,6-di -tert-butyl-4-methylpheno

I,

~2-tert- butyl-4,6-dimethylphenol, 2 ,6-di -tert-butyl-4-ethylphenol, 2 ,6-di tert-butyl -4-n-butylpheno I, 2 ,6-di -tert-butyl-4-iso butylphenol, 2,6dicyclopentyl-4-methylpheno I, 2 -(a-methylcyclohexyl)-4,6-dimethylpheno

I,

2,6-dioctadecyl-4-methylphenol, 2 ,4,6-tricyclohexylphenol, 2,6-di-tertbutyl-4-methoxymethylphenol, 2 ,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6- (1'-methyl-u ndec-1'-yl)phenol, 2 4 -dimethyl-6-(1'-methyl-heptadec-i'yl)phenol, 2 4 -dimethyl-6-(V-methyl-tridec-1'-yl)phenol, octylphenol, nonylphenol, dlodecylphenol and mixtures thereof.

2. Alkylthiomethyiphenols, for example 2,4-di-octylthiomethyl-6-tertbutyiphenol, 2,4-di-octylthiomethyl-6-methylphenol, 2,4-di-octyll-hiomethyl- 6-ethylphenol, 2,6-di-dodecylthiomethyl-4-nonylphenol.

3. A Ikylated hydrogui nones, for example 2 ,6-di -tert-butyl-4methoxypheno I, 2 ,5-di -tert-butyl-hydroqui none, 2 ,5-di -tert-amylhydroqui none, 2 ,6-di phenyl-4-octadecyloxypheno I, 2 ,6-di -tert-butylhydroqui none, 2 ,5-di -tert-butyl-4-hydroxyanisole, 3 ,5-d i-tert-butyl-4hydroxyaniso le, 3 ,5-di -tert-butyl-4-hydroxyphenylstearate, bis(3 butyl-4-hydroxyphenyl) adipate.

4. Hydroxylated thiodi phenyl ethers, for example 2 ,2'-thio-bis(6-tertbutyl-4-methylphenol), 2,2'-thio-bis(4-octylphenol), 4,4'-thio-bis(6--ertbutyl- 3 -methyl phenol), 4,4'-thio-bis(6-tert-butyl -2-methylpheno 4,4'-thiobis(3 ,6-di-sec-amylphenol), 4,4'-bis(2,6-dimethyl-4-hydroxyphenyl) disulfide.

Alkylidene bisphenols. for example 2,2'-methylene-bis(6-tert-butyl-4methylphenol), 2,2'-methylene-bis(6-tert-butyl-4-ethylphenol), 2,2'methylene-bis[4-methyl-6-(a-methylcyclohexyl)pheno 2 ,2'-methylenebis(4-methyl-6-cyclohexylphenol), 2 ,2'-methylene-bis(6-nonyl-4methylphenol), 2 ,2'-methylene-bis(4,6-di -tert-butypheno 2 ,2'-ethyl idene- ~bis(4,6-di -tert-butylpheno 2 ,2'-ethyl idene-bis(6-tert- butyl-4isobutyiphenol), 2 2 '-methylene-bis[6-(a-methylbenzyl)-4-nonylphenol], 2,2'methylene-bis[6-(a,a-di methyl benzyl)-4-nonylpheno 4,4-methylenebis(2 ,6-di-tert-butylpheno 4,4'-methylene-bis(6-tert-butyl-2methylpheno 1 ,l-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butane, 2,6bi s( 3 -tert-butyl-5-methyl-2-hydroxybenzyl)-4-methylpheno I, 1,1 tert-butyl-4-hydroxy- 2-methylphenyl)butane, 1,1 -bis(5-tert-butyl-4- *hyd roxy- 2-methylI p henyl)- 3 -n-dodecylImercapto butane, ethylene glycolIbis[3 ,3-bis(3'-tert-butyl-4'-hydroxyphenyl) butyrate], bis(3-tert-butyl-4hydroxy-5-methyl phenyl) di cyclopentadiene, bis[2-(3'-tert-butyl-2'-hydroxy- 5'-methyl-benzyl)-6-tert-butyl-4-methylphenylI terephthalate, 1,1 -bis(3 dimethyl-2-hydroxyphenyl)butane, 2,2-bis(3,5-di-tert-butyl-4hydroxyphenyl)propane, 2 b is(4- hydroxyphenyl)pro pane, 2 *butyl -4-hydroxy- 2 -met hyl phenyl)-4- n-dodecyl mercapto butane, 1,1,5,5tetra(5-tert-butyl-4-hydroxy-2 -methylphenyl)pentane.

6. Benzyl compounds, for example 3 ,5,3',5'-tetra-tert-butyl dihydroxydibenzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzy mercaptoacetote, tri s(3 ,5-di -tert-butyl hydroxybenzyl)am ine, bi s(4-tertbutyl-3-hydroxy-2 ,6-dimethylbenzyl) dithioterephthalate, butyl -4-hydroxybenzyl) sulfide, i sooctyl -3 ,5-di -tert-butyl-4-hydroxybenzyl mercaptoacetate.

7. Hydroxybenzylated malonates. for example dioctadecyl-2 ,2-bis(3 di-tert-butyl-2-hydroxybenzyl) malonate, di-octadecyl-2-(3-ter--butyl-4benzyl) malonate, didodecylmercaptoethyl-2 ,2-bis(3 tert-butyl-4-hydroxybenzyl) malo nate, di-[4-(1 ,1,3,3tetramethylbutyl)phenyl ,2-bis(3 ,5-di -tert-butyl-4-hydroxybenzyl) malonate.

8. Hydroxybenzyl aromatic compounds, for example 1,3,5-tris(3,5-ditert-butyl-4-hydroxybenzyl)-2 ,4,6-trimethyl benzene, 1 ,4-bis(3 ,5-di -tertbutyl -4-hydroxybenzyl)- 213 ,5,6-tetramethyl benzene, 2 ,4,6-tris(3 ,5-di -tertbutyl-4-hydroxybenzyl)pheno

I.

9. Triazi ne compounds, for example 2 ,4-bis-octylmercapto-6-(3 ,5-di tert-butyl-4-hydroxyani lino)-1,3,5-triazine, 2-oclylmercapto-4,6-bis(3,5-ditert-butyl-4-hydroxyaniIi no)-1 ,3 ,5-triazi ne, 2-octylmercapto-4,6-bis(3 tert-butyl-4-hydroxyphenoxy)-1 ,3 ,5-triazi ne, 2 ,4,6-tris(3 ,5-di -tert-butyl-4hydroxyphenoxy)-1 ,2 ,3-triazi ne, 1,3 ,5-tris(3 ,5-di-tert-butyl-4hydroxybenzyl) isocyanurate, 1,3 ,5-tris(4-tert-butyl-3-hydroxy-2 ,6d imethyl benzyl) isocyanurate, 2 ,4,6-tris(3 ,5-di -tert-butyl-4- ~hydroxyphenylethyl)-1 ,3 ,5-triazi ne, 1,3 ,5-tris(3 ,5-di -tert-butyl-4hydroxyphenylpropionyl)hexahydro-1,3,5-triazine, 1,3,5-tris(3,5di cyclohexyl-4-hydroxybenzyl) isocyanurate.

Phosphonates and phosphonites, for example butyl-4-hydroxybenzyl phosphonate, diethyl-3 ,5-di-tert-butyl-4hydroxybenzyl phosphonate, dioctadecyl-3 ,5-di -tert-butyl-4-hydroxybenzyl phosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3-methylbenzyI 0 phosphonate, calcium salt of 3 ,5-di -tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester, tetrakis(2 ,4-di -tert-butylphenyl)-4,4'-bi phenylene diphosphonite, 6 -isooctyloxy-2,4,8,10-tetra-tert-butyl-12H-dibenzo~d,g]- 0:0 1 ,3,2-dioxaphosphocine, 6 -f luoro-2,4,8,10-tetra-tert-butyl-12-methyl- 22. di bnod]-1 ,3,2-dioxaphosphocine.

11. Acylaminophenols, for example 4-hydroxy-lauric acid anilide, 4hydroxysteari c acid anilIide, N-(3 ,5-di -tert-butyl-4-hydroxyphenyl)-carbamic acid octyl ester.

12. Esters of b-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid with mono- or poly-hydric alcohols, such as methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, di pentaerythrito I, tris(hydroxyethyl) isocyanurate, N,N'bis(hydroxyethyl)oxali c acid diamide, 3 -thiaundecano I, 3-thiapentadecano

I,

trimethyl hexaned jo trimethylo I propane, di -tri methylo I propane, 4hydroxymethyl-lI-phospha-2 ,6 ,7-trioxabicyclo [2.2.2 ]octane.

13. Esters of b-(5-tert-butyl-4-hydroxy-3-methylphenyl)yproioni c acid with mono- or poly-hydric alcohols, such as methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythrito I, tris(hydroxy)ethyl isocyanurate, N,N'bis(hydroxyethyl)oxalic acid diamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanedio I, tri methylo I propane, 4-hydroxymethyl-1-phospha-2 ,6 ,7trioxabi cyclo [2.2.2 ]octane.

14. Esters of b-( 3 .5-dicycloheyl-4-hydro.xyphenyl)-propionic acid with mono- or poly-hydric alcohols, such as methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, ::::*pentaerythrito I, tris(hydroxy)ethyl isocyanurate, bis- ::*(hydroxyethyl)oxalic acid diamide, 3-thiaundecano I, 3 -thiapentadecano

I,

trimethylhexanedio I, tri methylo I propane, 4-hydroxymethyl-1 -phospha-2 ,6 ,7trioxabi cyc lo 2 .2.2 ]octane.

15. Esters of 3 ,5-di-tert-buyl-4-hydroxyphenylacetic acid with mono- or poly-hydric alcohols, such as methanol, ethanol, octanol, octadecanol, 1,6hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycolI, diethylene glycol, triethylene glycolI, pentaerythritol, tris(hydroxy)ethyl isocyanurate, N,N'-bis(hydroxyethyl)oxal ic acid diamide, 3 -thiaundecano I, 3-thiapentadecano I, trimethylhexanediol, tri methylolIpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane.

16. Amides of b-(3,5-di-tert-btyl-4-hydroxyphenyl)-propionic acid, such as N,N'-bis(3 ,5-di -tert-butyl-4hydroxyphenylpropionyl)hexamethylenediami ne, N,N'-bis(3,5-di-tert-butyl-4hydroxyphenyl pro pio nyl)i-ri methylened iam ine, N,N'-bis(3 ,5-di-tert-butyl-4hydroxyphenyipropionyl) hydrazi ne.

Preference is given to antioxidlants of groups I to 5, 10 and 12, especially 2,2b is(4- hydroxyphenyl)pro pane, esters of 3 ,5-di-tert-butyl-4hydroxyphenyipropionic acid with octanol, octadlecanol or pentaerythritol or tris(2,4-di-tert-butylphenyl) phosphite.

Where appropriate, it is also possible to use a mixture of antioxidlants having different structures.

The antioxidlants can be used in an amount of, for example, from 0.01 to advantageously from 0.1 to 10, and especially from 0.1 to 5, parts by weight, based on 100 parts by weight PVC.

U V absorbers and ligh t stab ilisers Examples are: 1. 2 2 ydroxyphenyl)-benzotriazo les, such as 2 methylphenyl)-benzotriazo le, 2 3 ',5'-di-tert-butyl-2'-hydroxyphenyl)benzotriazo le, 2 -(5S-tert-butyl-2-hydroxyphenyl)-benzotriazo le, 2 hydroxy-5'-(1 ,1,3 ,3-tetramethyl butyl)phenyl)-benzotriazo le, -tertbutyl-2'-hydroxyphenyl)-s..ch loro-benzotriazole, 2 -(3'-tert-butyl-2'le, 2 butyl-2'-hydroxyphenyl)-benzotriazo le, 2 2 '-hydroxy-4'-octoxyphenyl)- :*benzotriazo le, 2 i -tert-amyl hydroxyphenyl)- ben zotr iazo le, 2s(a,a-dimethylbenzyl)-2'-hydroxyphenyl)-benzotriazo le, a mixture of 2 ('tr-btl-2-hdrx-5-( tlxcrbn e y~hnl--c lo ro benzotriazo le, 2 3 -tert-butyl -ethyl hexyloxy)-carbo nylethyl loro-benzotriazo le, 2 3 '-tert-butyl-2'-hydroxy-5'-(2- *methoxycar bonylIethylI)phenyl)- 5- ch lo ro-ben zotriazo le, 2-(3'-tert-butyl-2'hyd roxy-5'- (2 -met hoxycarbo nylethylI)p henyl) benzotriazo le, 2-(3'-tert-butyl- 2 hyd roxy-5'-(2 -o ctyloxycar bony lethyl)p heny)-ben zotr iazo le, 2-(3'-tertbutyl [2 -ethyl hexyloxy)carbo nylethyl hydroxyphenyl)benzotriazo le, 2 -(3'-dodecyl 2 '-hydroxy- met hyIphenylI)-benzotri azo le, and 2 -(3'-tert-butyl-2'-hydroxy-5'-(2 -isooctyloxycarbonylethyl)phenyl.

benzotriazole, 2,2'-methylene-bis[4-(1,1 ,3,3-tetramethylbutyl)-6benzotriazol-2 -ylphenol]; the transesterif ication product of 2 -[3'-tertbutyl-5'-(2 -methoxycarbonylethyl)-2'- hydroxy-phenyl]-benzotriazo le with polyethylene glycol 300; wherein R =3'-tert-butyl-4'-hydroxy-5'-2Hbenzotriazo l-2-ylphenyl.

2. 2-Hydroxybenzophenones, such as the 4-hydroxy-, 4-methoxy-, 4octyloxy-, 4-decyloxy-, 4-dodecyloxy-, 4-benzyloxy-, 4,2',4'-trihydroxy- or 2'-hydroxy-4,4'-dimethoxy derivative.

3. Esters of unsubstituted or substituted benzoic acids, such as 4-tertbutyl-phenyl sal icylate, phenyl sal icylate, octyiphenyl salicylate, di benzoylresorci nol, bis(4-tert-butyl benzoyl)resorci no I, benzoylresorci no I, 3 ,5-di-tert-butyl-4-hydroxybenzoi c acid 2 ,4-di -tert-butyphenyl ester, di -tert-butyl-4-hydroxybenzoi c acid hexadlecyl ester, 3 ,5-di-tert-butyl-4hydroxybenzoic acid octadlecyl ester, 3 ,5-di-tert-butyl-4-hydroxybenzoic acid 2-methyl-4,6-di -tert-butyphenyl ester.

4. Acrylates, such as a-cyano-b,b-diphenylacrylic acid ethyl ester or isooctyl ester, a-carbomethoxy-cinnamic acid methyl ester, a-cyano-bmethyl-p-methoxy-cinnamic acid methyl ester or butyl ester, acarbomethoxy-p-methoxy-cinnamic acid methyl ester, N-(b-carbomethoxyb-cyanovinyl)-2-methyl-i ndo line.

Nickel compounds, such as nickel complexes of 2,2'-thio-bis[4-(1,1,3,3..

tetramethylbutyl)phenol], such as the 1:1 or the 1:2 complex, where appropriate with additional ligands, such as n-butylamine, triethanolamine or N-cyclohexyl diethanolamine, nickel dibutyl dithiocarbamate, nickel salts of 4-hydroxy-3 ,5-di-tert-butyl benzylphosphoni c acid monoal kyl esters, such as methyl or ethyl ester, nickel complexes of ketoximines, such as 2-hydroxy-4methyl phenyl-undlecylketoxime, nickel complexes of hydroxy-pyrazole, where appropriate with additional ligands.

Sterically hindered amines, such as bis( 2 2 ,6,6-tetramethyl-piperidyl) sebacate, bis(2 ,2 ,6,6-tetramethyl-piperidyl) succi nate, bis(1 ,2,2 ,6,6pentamethylpi peridyl) sebacate, n-butyl-3 ,5-di -tert-butyl-4-hydroxybenzylmalonic acid bis(l,2,2,6,6-pentamethylpiperidyl) ester, the condensation product of 1-hydroxyethyl-2 ,2 6 6 -tetramethyl-4-hydroxypiperidine and succinic acid, the condensation product of N,N-bis(2,2,6,6-tetramethyl-4piperidyl)hexamethylenediamine and 4 -tert-octylamino-2,6-dichloro4,3,5-s triazi ne, tr is(2 ,2,6 ,6-tetramet hyl pi peridyl) i tr i lotri acetate, tetraki s(2 ,2 ,6 6 -tetramet hyl1-4- pi per idyl1)- 1, ,2,3 butane tetraoate, 1 ,2ethanediyl)-bis(3 ,3 ,5,5-tetrametIhyl-pi perazi none), 4-benzoyl-2,2,6,6tetramethylpi peridi ne, 4-steary loxy- 2,2 ,6 ,6-tetramethylI p i per id i tie, bis(1 ,2 ,2 1 6 6 -pentamethylpiperidyI)-2-n-butyI-2-(2-.hydroxy-3,5-di-tertbutylbenzyl) malonate, 3 -n-octyl-7,7,9,9-tetramethyl-1,3,8triazaspiro[4.5]decane-2 ,4-dione, bis(1-octyloxy-2 ,2 ,6,6tetramethylpi peridyl) sebcicate, bis(1-octyloxy-2 ,2 ,6, 6 -tetramethylpiperidyl) succi nate, the condensation product of N,N'-bis(2 ,2 ,6,6-tetramethyl-4piperidyl)-hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-.

triazine, the condensation product of 2 -chloro-4,6-di(4-n-butylamino- 2 2 6 6 -tetramethyl p iper idyl)- 135-triazi ne and 1,2-bis(3aminopropylamino)ethane, the condensation product of 2-chloro-4,6-di-(4-nbutylamino-l,2,2,6,6-pentamethylpiperidyl)..1,3,5triazine and 1,2-bis(3ami nopropylami no)ethane, 8-acetyl-3-dodecyl-7,7,9 ,9-tetramethyl -1,3,8triazaspi ro [4.5]decane-2 ,4-dione, 3-dodecyl-l-(2 ,2 ,6,6-tetramethyl-4- 3 -dodecyl-l-(1,2,2,6,6-pentamethyl.4and Chimassorb 966.

7. Oxalic acid diamides, such as 4 ,4'-di-octyloxy-oxanilide, 2,2'-di- -tert-butyl oxani lidle, 2 ,2'-didodecyloxy-5,5'-di -tert-butyl oxani lidle, 2-ethoxy-2'-ethyl oxanilidle, N,N'-bis(3-dimethylaminopropyl) oxalamide, 2-ethoxy-5-tert-butyl-2'-ethyl oxanulidle and a mixture thereof with 2 -ethoxy-2'-ethyl-5,4'-di-tert-butyl oxanilide, mixtures of o- and pmethoxy- and o- and p-ethoxy-di substituted oxanilides.

8. 2-(2-Hydroxyphenyl ,3 5-triazi nes, such as 2 ,4,6-tris(2-hydroxy-4octyloxyphenyl 1,3 ,5-triazi ne, 2 -(2-hydroxy-4-octyloxyphenyl)-4,6-.bis(2 ,4dimethylphenyl)-1 ,3 ,5-triazi ne, 2-(2 ,4-di hydroxyphenyl)-4,6-bis(2 14- ~.dimethylphenyl)-1 ,3,5-triazine, 2 4 bi s(2 -hydroxy-4- pro pyloxyphenyl)-6-.

(2 ,4-dimethylphenyl)- 1,3 ,5-triazinte, 2 2 -hydroxy-4-octyloxyphenyl)-4,6bis(4-methylphenyl)-1 ,3 ,5-triazi ne, 2-(2-hydroxy-4-dodecyloxyphenyl).4,6bis(2,4-dimethylphenyl)-1,3,5-triazine, 2 2 -hydroxy-4-(2-hydroxy-3-.

butyloxy-propyloxy)phenyl]-4,6-.bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2hydroxy-4-(2-hydroxy-3 -octyloxypropyloxy)phenyl ]-4,6-bis(2 ,4dimethylphenyl)-1 ,3 Propel/ants Propellants are organic azo and hydr'azo compounds, tetrazoles, oxazines, isatoic anhydride, and sodium carbonate and sodium hydrogen carbonate.

Preference is given to azodicarbonamide and sodium hydrogen carbonate and mixtures thereof.

Definitions and examples of impact strength modifiers and processing aids, gelling agents, antistatic agents, biocides, metal deactivators, optical brighteners, fire-proofing agents and antifogging agents are described in "Kunststoffadditive" (Plastics Additives), R.Gachter/H.Miller, Carl Hanser Verlag, 3 r Ed., 1989, and "Handbook of Polyvinyl Chloride Formulating", E.J.Wilson, J.Wiley Sons, 1993. Impact strength modifiers are also extensively described in "Impact Modifiers for PVC", J.T.Lutz/b.L.Dunkelberger, John Wiley Sons, 1992.

The stabiliser combination can be prepared not only by mixing the components in apparatus suitable for the purpose, but also by preparing some of the additional components in situ in a melt of glidants and/or metal soaps before adding component That method is suitable especially for the in situ preparation of calcium acetyl acetonate (cf. EP 336 289).

Examples of chlorine-containing polymers to be stabilised or of the recyclates thereof are: polymers of vinyl chloride, vinyl resins containing vinyl chloride units in their structure, such as copolymers of vinyl chloride and vinyl esters of aliphatic acids, especially vinyl acetate, copolymers of vinyl chloride with esters of acrylic and methacrylic acid and with acrylonitrile, copolymers of vinyl chloride with diene compounds and unsaturated dicarboxylic acids or the anhydrides thereof, such as copolymers of vinyl chloride with diethyl maleate, diethyl fumarate or maleic acid anhydride, post-chlorinated polymers and copolymers of vinyl chloride, copolymers of vinyl chloride and vinylidene chloride with unsaturated aldehydes, ketones and others, such as acrolein, crotonaldehyde, vinyl methyl ketone, vinyl methyl ether, vinyl isobutyl ether and the like; polymers of vinylidene chloride and copolymers thereof with vinyl chloride and other polymerisable compounds; polymers of vinyl chloroacetate and dichlorodivinyl ether; chlorinated polymers of vinyl acetate, chlorinated polymeric esters of acrylic acid and alpha-substituted acrylic acid; polymers of chlorinated styrenes, for example dichlorostyrene; chlorinated gum; chlorinated polymers of ethylene, polymers and post-chlorinated polymers of chlorobutadiene and the copolymers thereof with vinyl chloride, gum hydrochloride and chlorinated gum hydrochloride; and mixtures of the mentioned polymers with one another or with other polymerisable compounds.

Also included are the graft polymers of PVC with EVA, ABS and MBS.

Preferred substrates are also mixtures of the above-mentioned homo- and copolymers, especially vinyl chloride homopolymers, with other thermoplastic and/or elastomeric polymers, especially blends with ABS, MBS, NBR, SAN, EVA, CPE, MBAS, PMA, PMMA, EPDM and polylactones.

Preference is given also to suspension and bulk polymers, and to emulsion polymers.

Polyvinyl chloride is especially preferred as the chlorine-containing polymer, especially in the form of a suspension polymer and of a bulk polymer.

Within the scope of this invention, PVC is also to be understood to include copolymers or graft polymers of PVC with polymerisable compounds such as acrylonitrile, vinyl acetate or ABS, which may be suspension, bulk or emulsion polymers. Preference is given to PVC homopolymers also in combination with polyacrylates.

Also suitable for stabilisation within the scope of this invention are especially recyclates of chlorine-containing polymers, the polymers being those described in detail above, which have been damaged as a result of processing, use or storage. PVC recyclate is especially preferred. The recyclates may also contain small amounts of foreign substances, such as paper, pigments and adhesives, which are often difficult to remove. Those foreign substances may also originate from contact with various substances during use or working-up, such as propellant residues, traces of lacquer, traces of metal, and initiator radicals.

The invention relates also to a process for stabilising chlorine-containing polymers, which comprises adding to the polymers a stabiliser combination according to claim 1 and homogeneously mixing the components in apparatus suitable for the purpose.

0 Advantageously, the stabilisers can be incorporated using the following methods: Sin the form of an emulsion or dispersion (one possibility is, for example, as a paste-like mixture). An advantage of the combination according to the invention in the case of that form of introduction is the stability of the paste); in the form of a dry mixture during the mixing of additive components or polymer mixtures; by direct addition to the processing apparatus (for example a calender, mixer, kneader, extruder or the like) or in the form of a solution or melt.

Stabilised PVC according to the invention, to which the invention also relates, can be prepared in a manner known per se, the stabiliser combination according to the invention and, where appropriate, any further additives being mixed with the PVC using apparatus known per se, such as the processing apparatus mentioned above. In that procedure, the stabiliSers can be added individually or as mixtures or alternatively in the form of master batches.

The invention thus also relates to a process for the preparation of stabilised PVC, which comprises mixing components and described hereinbefore and, where appropriate, any further additives with the PVC using apparatus, such as calenders, mixers, kneaders, extruders and the like.

PVC stabilised in accordance with the present invention can be brought into the desired form by known methods. Those methods are, for example, grinding, calendering, extrusion, injection moulding, sintering or spinning, also blow extrusion or processing by the plastisol method. The stabilised PVC can also be processed to form foams. When azodicarbonamide is used as propellant it is advantageous not additionally to use 1,3-diketones.

Stabilised PVC according to the invention is suitable, for example, for semirigid and soft formulations, especially as soft formulations for wire sheathing, crash pad sheeting (automobiles) and cable insulation, which is especially preferred. In the form of semirigid formulations, the PVC according to the invention is suitable especially for decorative sheeting, foams, agricultural sheeting, hoses, sealing profiles and office film.

In the form of rigid formulations, the stabilised PVC according to the invention is suitable especially for hollow bodies (bottles), packaging sheets (thermoforming sheets), blown sheets, pipes, foams, heavy-duty profiles (window frames), transparent wall profiles, building profiles, sidings, fittings, office sheeting and equipment housing (for computers, household appliances).

Examples of the use of the PVC according to the invention as plastisol are synthetic leathers, floor coverings, textile coatings, wallpapers, coil coatings and underseal for motor vehicles.

Examples of sintered PVC applications for the stabilised PVC according to the invention are slush, slush mould and coil coatings.

Preference is given to PVC rigid foam mouldings and PVC pipes, such as those for drinking water or waste water, pressure pipes, gas pipes, cable conduits and cable-protection pipes, pipes for industrial pipelines, drain pipes, waste pipes, guttering and drainage pipes. For more detailed information see "Kunststoffhandbuch PVC" (PVC Plastics Handbook), Volume 2/2, W.Becker/H.Braun, 2" Ed., 1985, Carl Hanser Verlag, pages 1236-1277.

The Examples that follow illustrate the invention further without, however, limiting the invention. Unless otherwise indicated, parts and percentages relate to the weight, as in the remainder of the description.

Example 1: Static heat test The mixtures according to the following Tables are each plasticised for minutes at 190 0 C and 170 0 C in a roll mill. Test strips are cut from the resulting sheets (which are 0.3 mm thick) and subjected to heating in a Mathis Thermo- Takter at 190 0 C for the period indicated below in the Tables. Then the Yellowness Index (YI) according to ASTM-1925-70 is determined.

The lower the YI value found, the more effectively the stabiliser system prevents yellowing and thus damage to the material. The long-term thermostability of the stabilised polymer can also be determined from the sudden appearance of discolouration throughout the polymer.

ooo The longer that that discolouration when subjected to heating is delayed, or the lower the initial discolouration and the better the colour maintenance (low mean discolouration), the more effective is the stabiliser.

Table I: Static heat test at 190 0 C (rolled for 5 min at 190"C) Mixture Il 12 13 Solvic 268 PC (S-PVC K value 68) 100 100 100 Omyalite 30 Ca stearate 0.6 0.6 0.6 Hostalub H4 2 1.0 1.0 Hostalub H12 2 0.2 0.2 0.2 CH 3003) 0.4 0.4 0.4 Mark 6045 ACM 4 0.3 0.3 0.3 Stabiliser 5 0.2 0.2 0.2 NaCIO 4 //0.05 YI YI YI Minfutes 20.7 29.9 22.2 28.4 66.6 29.1 40.2 108.4 39.2 ')Chalk 2 )Gidant supplied by Hoechst (paraffin Wax) 2 ,)Glidant supplied by Hoechst (polar ethylene wax) 3 )PhenylisodecyI phosphite 4)Mixture of 9% NaCIO 4 450/ CaCO 3 40%/ CaSiO 3

H

2 0 5 6-Amino-1,3-dimethyl-uracil It is found that the use of small amounts of perchlorate compound as component B in mixtures Ii and 13 according to the invention results in 5* considerably better stabilisation than without component B.

Table ID: Static heat test at 190'C (rolled for 5 min at 170 0

C)

Mixture 111 112 113 1I4 115 116 117 118 119 Evipol SH 6030 (PVC K< value 60) CH 3003) Wax E 6 Epox. soya oilI Araldite GY 2507) Araldite PT 8108) Stabiliser 15) Stabiliser 29 Stabiliser 310) 100 100 0.8 0.8 0.4 0.4 5.0 5.0 1.0 1.0 100 0.8 0.4 1.0 100 0.8 0.4 5.0 1.0 100 0.8 0.4 5.0 1.0 100 0.8 0.4 1.0 100 0.8 0.4 5.0 100 0.8 0.4 5.0 100 0.8 0.4 0 *0 0 0 0* 0 *0000.

Minfutes 20 25 30 YI yI YI 17.4 17.3 15.6 23.2 33.7 29.5 33.6 54.9 46.3 YI YI YI 13.4 11.8 12.5 17.8 18.5 17.7 23.5 29.9 27.8 YI YI YI 14.8 16.2 17.1 21.2 24.4 24.0 27.2 33.6 30.8 3 )PhenylisodecyI phosphite 6 )Ester wax (based on: montanic acid) 7 Ciglycidyl ether of bisphenol A (liquid epoxide) 8) Solid heterocyclic epoxy resin (triglycidyl isocyanurate) 9 )6-Amino-1,3-di-n-butyluraci 10 6-Am ino-,3 -di -ethyl -th iouraci I The stabiliser combination (114 to 119) of glycidyl and aminouracil compound according to the invention is found to be superior.

N

Table III: Static heat test at 190 0 C (rolled for 5 min at 170 0

C)

Mixture Evipol SH 6030 (PVC K value 60) CH 3003) Wax E 6 Epox. soya oilI Rhodiastab 50"1) Ca stearate Zn stearate DA SC 12 Alkamizer 113) Stabiliser 15 Stabiliser 320) 111111121113 111411151116 111711181119 100 0.8 0.4 5.0 0.2 0.3 0.5

YI

100 0.8 0.4 5.0 0.2 0.3 0.5 1.0

YI

100 0.8 0.4 5.0 0.2 0.3 0.5

YI

100 0.8 0.4 5.0 0.2 0.3 0.5 1.0 1.0

YI

100 0.8 0.4 5.0 0.2 0.3 0.5 1.0 1.0

YI

100 0.8 0.4 5.0 0.2 0.3 0.5

YI

100 100 0.8 0.8 0.4 0.4 5.0 5.0 0.2 0.2 0.3 0.3 0.5 0.5 1.0 yI YI 100 0.8 0.4 0.2 0.3 1.

YI

Minfutes

S

*5

S

*5 S

S

*SS.

15.2 31.4 57.2 22.7 37.4 66.9 12.9 10.6 16.1 20.6 22.5 26.5 34.0 49.1 41.8 10.0 16.3 24.1 10.2 12.4 17.0 18.8 ")Stearoy benzoyl -methane supplied by RHONE-POULENC 1 2 )bi hydroxyalumi nium sodium carbonate (tA SC) 1 3 Hydrotalcite supplied by KYOWA (Japan) The addition of dawsonite and the addition of hydrotalcite both increase the stability.

*SS.

Table IV: Static heat test at 190*C (rolled for 5 min at 170*C) Mixture Evipol SH 6030 (PVC K value 60) CH 3003) Wax E 6 Epox. soya oilI Rhodiastab 5011) Chimassorb 944 14) Malbit CR (maltite) IDipentaerythrito

I

Stabiliser 15) Stabiliser 29 Stabiliser 319) IVI IV2 IV3 IV4 1V5 IV6 IV7 IV8 IV9 IV1OIV11 IV12 100 0.8 0.4 2.0 0.2 1.0 100 0.8 0.4 2.0 0.2 1.0 100 0.8 0.4 2.0 0.2 100 0.8 0.4 2.0 0.2 0.15 100 0.8 0.4 2.0 0.2 0.15 1.0 100 0.8 0.4 2.0 0.2 0.15 1.0 100 0.8 0.4 2.0 0.2 0.5 1.0 100 0.8 0.4 2.0 0.2 0.5 1.0 100 0.8 0.4 2.0 0.2 1.0 100 0.8 0.4 2.0 0.2 0.5 100 0.8 0.4 2.0 0.2 0.5 100 0.8 0.4 0.2 1.0 1.0 YI YI YI Yi I YI Yi YI YI Y, YI YI a.

a a.

a a.

a a a Minfutes 15 20 25 6.0 10.1 24.2 59.9 6.6 12.7 10.3 18.7 6.6 5.8 7.8 7.7 9.0 11.1 15.4 24.8 5.8 7.3 8.9 11.1 6.2 7.2 9.4 19.5 8.1 10.4 11.1 5.4 6.7 11.7 5.8 10.0 9.9 11.2 20.1 15.7 29.5 47.9 13.8 >70 >60 29.1 10.6 32.1 1 4 sterically hindered amine supplied by CIBA-GEIGY AG (HALS) The stabiliser combinations according to the invention (IV4 to IV12) are found to give improved stabiliser activity.

Table V: Static heat test at 190'C Mixture Evipol SH 6030 (PVC K value 60) CH 3003) Wax E 6 Epox. soya oilI Rhodiastab 50" Ca stearate Zn stearate Wessalite P" 5 Zeolite p 1 6 Stabiliser 15) Stabiliser 29 Stabiliser 310) VI V2 V3 100 0.8 0.4 2.0 0.2 0.3 0.5 1.0

YI

100 0.8 0.4 2.0 0.2 0.3 0.5 1.0

YI

100 0.8 0.4 2.0 0.2 0.3 0.5 1.0

YI

(rolIled V4 100 0.8 0.4 2.0 0.2 0.3 0.5 1.0 1.0

YI

for 5 min at 170'C) V5 V6 V7 V8 V9 100 0.8 0.4 2.0 0.2 0.3 0.5 1.0 1.0

YI

100 0.8 0.4 2.0 0.2 0.3 0.5

YI

100 100 0.8 0.8 0.4 0.4 2.0 2.0 0.2 0.2 0.3 0.3 0.5 0.5 1.0 YE YI 100 0.8 0.4 0.2 0.3 1.

YI

Minfutes a a a.

a.

a a a.

a. a a 10.3 19.6 41.1 12.3 15.4 34.7 28.6 29.5 58.8 8.8 12.4 21.0 10.6 14.2 16.8 19.5 32.5 30.5 9.3 9.4 13.3 15.3 25.0 29.2 15.7 22.6 34.8 1 5 )Na zeolite A supplied by UEGUSSA 1 6 )Na zeolite P supplied by DEGUSSA The stabiliser combination comprising hydrotalcite and zeolites is found to give better results.

Table VI: Static heat test at 190'C (rolled for 5 minutes at 170-C) V13 V14 Mixture Evipol EH 6030 (PVC K value 60) Wax E 6 CH 3003) Epox. soya oilI Ca stearate Zn stearate Rhodiastab 5011) 0tab6lise 1) Stabiliser Minutes 20 30 VII V12 100 100 0.4 0.4 0.8 0.8 5.0 5.0 0.55 0.55 0.25 0.25 100 100 0.4 0.4 0.8 0.8 5.0 0.55 0.55 0.25 0.25 0.3 0.3 /0.3 YI YI YI 9 9 9 9 9 99** 99** 9* *9 9 9*9* *9**e9 18.5 9.7 36.5 18.8 103 33.3 11.4 15.6 21.9 28.3 46.0 59.2 1 7 B-keto ester of the formula 0 YN 'kN Y

Y

Y (CH 2 2 -0-CO-CH 2 -C0-CH 3 It can be seen that combinations comprising f-diketone or r-keto ester give good results.

Table VII: Static heat test at 190 0 C (rolled for 5 min at 170 0

C)

Mixture VII1 V112 V11I3 V114 V115 V116 V117 V118 Evipol SH 6030 (PVC K value 60) CH 3003) Wax E 6 Epox. soya oil Ca stearate Zn stearate Synesal Stavi nor D 507'9) Stabiliser 15 Stabiliser 319) 100 100 100 0.8 0.8 0.8 0.4 0.4 0.4 5.0 5.0 5.0 0.55 0.55 0.55 0.25 0.25 0.25 1.0 1.0 YI YI YI 5.4 4.8 6.3 6.4 4.7 6.7 6.7 5.5 7.0 7.3 7.6 8.3 10.8 12.3 12.5 19.9 28.5 22.9 33.7 65.8 45.1 100 100 100 0.8 0.8 0,8 0.4 0.4 0.4 5.0 5.0 5.0 0.55 0.55 0.55 0.25 0.25 0.25 0.2 0.2 /0.2 1.0 /1.0 100 100 0.8 0.8 0.4 0.4 5.0 0.55 0.55 0.25 0.25 0.2 0.2 1.0 VI VI 2.9 4.4 3.7 4.9 4.5 6.7 6.3 8.2 11.3 11.9 23.8 21.3 a. Minfutes 0 5 10 20 25

YI

2.9 3.5 4.4 5.4 8.9 18.0 31.8 VI YI 3.9 2.3 4.1 2.3 5.3 3.5 7.5 5.4 13.9 9.3 27.2 17.5 64.232.3 62.6 38.4 18 )Thiodiethylene-bis(5-methoxy-carbo nyl-2 ,6-dimethyl-1 ,4-di hydro-pyridi ne)-3carboxylate supplied by LAGOR '93bsoeyoyaboy-,-iehl14 dihydropyridine supplied by ATOCHEM The test shows that stabiliser combinations comprising dihydropyridines (V114 to V118) have improved initial colour and colour maintenance (mean colour).

Claims (4)

1. A stabiliser combination comprising A) at least one compound of formula I 0 R* 1 Y 'N NH 2 II wherein R*l and R*2 are each independently of the other CI-Cl2alkyl, C3- C6alkenyl, C5-Cscycloalkyl that is unsubstituted or substituted by from 1 to 3 C1-C4cxlkyI, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or chlorine atoms, or C7-C9phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or chlorine atoms, and R*1 and R*2 may additionally be hydrogen and CI-Cl2alkyI, and Y is B) at least one compound from the group:

9.:1B8) hydrotalcites. 2. A stabiliser combination according to claim 1, wherein R*1 and R*2 are each independently of the other H and C1-C4alkyl or C1-C4alkyl. 3. A stabiliser combination according to claim 1, wherein the compound of component A) is 6-amino-1,3-dimethyl-uracil, 6-amino-1,3-di-n-propyl-uracil, 6- amino-1,3-di-n-butyl-uracil, 6-amino-1,3-diethyl-thiouracil or 6-amino-1,3-di-n- butyl-thiouracil. 4. A stabiliser combination according to any one of claims 1 to 3, which additionally comprises at least one epoxidised fatty acid ester. A stabiliser combination according to any one of claims 1 to 4, which additionally comprises zinc and/or alkali metal and/or alkaline earth metal carboxylates or aluminium carboxylates. 6. A stabiliser combination according to any one of claims 1 to 5, which additionally comprises at least one further substance from the groups of the phosphites, antioxidants, beta-dicarbonyl compounds, plasticisers, fillers, glidants and pigments. 7. A stabiliser combination according to claim 6, wherein the filler is chalk. A stabiliser combination according to claim 6, wherein the glidant is calcium stearate. 9. A stabiliser combination according to claim 6, wherein titanium dioxide is used as the pigment. a 0o.A composition comprising a chlorine-containing polymer and a stabiliser combination according to any one of claims 1 to 9 11 A composition according to claim 10, wherein PVC is used as the chlorine- containing polymer. 12 .A method of stabilising chlorine-containing polymers, which comprises incorporating into the chlorine-containing polymers a stabiliser combination according to any one of claims I to 9

13. A stabilizer combination of the formula I, or a polymer containing the same substantially as hereinbefore described with reference to the examples.

14. A method for stabilising chlorine-containing polymers, substantially as hereinbefore described with reference to the examples. DATED this 22nd day of October, 1999 0« WITCO VINYL ADDITIVES GmbH By its Patent Attorneys DAVIES COLLISON CAVE a a *0